| Subject/Photo | Publication | Page |
| M C Foster buses (as Burlington Trailways) | BB24 | 34 |
| Machine shop Alliance interior view (c1900) | BB44 | 84 |
| Mack AW #100 Galesburg yard (1929) | BB 6 | 5 |
| Mack AW #100/9100/8900 gas-electric plans | BB 6 | 5 |
| Mack AW #8900 gas-electric awaiting disposal (6/52) | BB 6 | 5 |
| Mack AW gas-electric demonstration (12/28) | BB 6 | 4 |
| Mack bus Burlington Trailways | BB24 | 18 |
| Mack bus DCSP. | BB24 | 30 |
| Macomb depot (c1910 / c2008) | Z 58 | 1+ |
| Magellan presidential private car Burlington (5/50) | BB23 | 95 |
| Mahaffey Commission Co. billboard drawings and model | BB28 | 35 |
| Maiden Rock chair car #369 (later office #68) (1897) | BB17 | 46 |
| Maiden Rock, Mississippi River CB&Q postcard (c1925) | Z 57 | 23 |
| Mail car #1 H&St.J Burlington Centennial (1955) | BB23 | 111 |
| Mail cars - see RPO, Coach-mail, Baggage-mail | | |
| Mail crane, wooden | BB 8 | 25 |
| Mail pouch catcher arm and crane plans | BB 8 | 20 |
| Mail Service - full article | BB 8 | 4 |
| Mail storage car ex horse car Expo Flyer Red Oak (1947) | BB42 | 189 |
| Mail storage cars (ex Army kitchen) Council Bluffs (6/63) | BB 4 | 7 |
| Mail truck West Frankfort (4/56) | BB35 | 157 |
| Mail unloading from baggage car Edgemont (8/64) | BB36 | 46+ |
| Maintenance of way - see type (e.g. Wrecker) or function (e.g. Sand service) | | |
| Maintenance of way, Coalfields | BB35 | 189-97 |
| Maintenance of way orange paint (Z 93-3, Z 28) | Z 28 | |
| Mallet compound locos (2-6-6-2)- full article | BB34 | 4 |
| Mallet enginehouses | BB34 | 24 |
| Mallet locos class T-2 - full article | BB 3 | 4 |
| Mallet roster | BB34 | 56 |
| Mallet shed Deadwood (7/51) | BB 9 | 27 |
| Malvern depot | BB22 | 33 |
| Malvern, Io. | BB21 | 34-5 |
| Manchester & Oneida purchase of loco #379 (A-2) (6/29) | BB45 | 51 |
| Mandel Bros. furniture & floor coverings for Zephyr lounge advert (4/34) | BB43 | 38 |
| Mannix Auto-Trak ballast sled (1965) | BB35 | 217 |
| Map Albia/Des Moines region | Z 49 | 10A/C |
| Map American Buslines routes | BB24 | 42 |
| Map Aurora track elevation | BB46 | 10 |
| Map B&MR (1880) | BB16 | 17 |
| Map B&MR system (1900) | BB44 | 5 |
| Map B&MR loco facility, Burlington | BB23 | 12 |
| Map B&W / B&NW (1900) | BB30 | 5 |
| Map BH&FP operations 1881-1930 | BB41 | 8 |
| Map Billings - Paducah low grade line proposal (1914) | BB40 | 4 |
| Map Black Hills railways 1881-1930 | BB41 | 8 |
| Map Black Hills South Dakota and Wyoming (1915) | BB34 | 92 |
| Map Burlington Lines - Sign of Dependable Transport advert | BM | 28 |
| Map Burlington perspective 1889 | BB23 | 42 |
| Map Burlington Shops B&MR (1880) | BB26 | 5-9 |
| Map Burlington system 1898 | BB11 | 9 |
| Map Burlington Trailways routes (1936) | BB24 | 13 |
| Map Burlington Trailways system | BB24 | 40-1 |
| Map Cambria branch (c1900) | BB34 | 72 |
| Map Centralia (c1925) | BB35 | 23 |
| Map Centralia engine facilities (c1925) | BB35 | 27 |
| Map Centralia valuations (1917) | BB35 | 229 |
| Map Chicago – Cicero freight houses and yards (1958) | BB46 | 60-1 |
| Map Cicero Classification Yard opening, guests tour (2/58) | BB46 | 60-1 |
| Map Cleburne, Tx. town (1904) | BB19 | 6 |
| Map Creston (c1875) | BB11 | 6-8 |
| Map Creston Division | BB22 | 22 |
| Map D&IMC bus routes | BB24 | 27-9 |
| Map Deadwood-Lead railways | BB41 | 16 |
| Map DSLP routes | BB24 | 31-3 |
| Map Edgemont-Deadwood branch | Z 57 | 28 |
| Map freight services with schedules (10/64) | FS1 | |
| Map Herrin Junction (1917) | BB35 | 47 |
| Map Jacksonville & St Louis Railway | BB35 | 5 |
| Map Metropolis valuation (18917) | BB35 | 168 |
| Map National Trailways System | BB24 | 40-1 |
| Map O’Neill branch | BB27 | 4 |
| Map Omaha & South Western Railroad | BB16 | 13 |
| Map Oskaloosa, Io. | BB30 | 62-3 |
| Map Ottumwa Division (3/63) | Z 61 | 10 |
| Map Pacific Junction (c1950) | BB22 | 36 |
| Map Pacific Short Line | BB27 | 4 |
| Map Pond Creek mine trackage (1917) | BB35 | 52 |
| Map Seneca | BB 9 | 1 |
| Map Southern Illinois mines (c1952) | BB35 | 106 |
| Map Spearfish branch | BB34 | 60 |
| Map Stirling, Co. (1927) | BB32 | 7 |
| Map T&BV routes | BB19 | 15 |
| Map Trinity & Brazos Valley Railway (1904) | BB19 | 5 |
| Map West Eola Industrial Lead | Z 60 | 20 |
| Map Wind River Canyon re-alignment post 1923 flooding | BB40 | 9 |
| Mark Twain Zephyr - see also Zephyr #9903 | | |
| Mark Twain Zephyr #9903 publicity photo | BB13 | 17 |
| Mark Twain Zephyr and Aristocrat painting (Richard Schultz) | BB33 | 153 |
| Mark Twain Zephyr as Advance Denver Zephyr (5/36) | BB13 | 18 |
| Mark Twain Zephyr Budd builders plate | Z 57 | 19+ |
| Mark Twain Zephyr Burlington (c1945) | BB23 | 98 |
| Mark Twain Zephyr Burlington (8/52) | BB23 | 98 |
| Mark Twain Zephyr Cascade Landing wye | BB23 | 68 |
| Mark Twain Zephyr coach truck | Z 57 | 20+ |
| Mark Twain Zephyr Hannibal/Keokuk | BB13 | 17 |
| Mark Twain Zephyr last run Old Munroe (4/58) | C 05 | 8 |
| Mark Twain Zephyr Mars light at Burlington | BB23 | 98+ |
| Mark Twain Zephyr obs-lounge #572 last run Old Munroe (4/58) | C 05 | 8 |
| Mark Twain Zephyr transported to Granite City, IL (2007) | Z 57 | 18+ |
| Mark Twain Zephyr under repair Minooka, Il. (12/99) | Z 41 | 10 |
| Mark Twain Zephyr with Zephyr #9903 (5/51) | BB13 | 41 |
| Mark Twain Zephyr Wood Tower, Burlington | BB23 | 69 |
| Mark Twain Zephyr, West Quincy (c1955) | Z 36 | 1+ |
| Mark Twain's house, Hannibal, MO CB&Q postcard (c1917) | Z 57 | 24+ |
| Marquette Cement, LaSalle, reciprocal switching (Z 99-9, Z 40) | Z 41 | |
| Martinsburg depot | BB30 | 58 |
| Maryville depot | BB 8 | 12 |
| Mason Bogie loco 2-8-6T narrow gauge B&NW #1 (c1890) | BB30 | 6 |
| Masonite Presdwood paneling for Zephyr advert (4/34) | BB43 | 17 |
| Massena depot | BB22 | 47 |
| Masterson, Rodney “Bat” obituary | BB37 | 3 |
| Matchbook covers (CB&Q collectibles) | Z 49 | 5+ |
| Mather stock cars | BB25 | 86-8 |
| Maxon/Albia track diagram/alignment chart | Z 49 | 10E |
| Max Big-Man Native American artist CB&Q postcard (c1925) | Z 57 | 26 |
| McCabe & Steen track laying machine Douglas (1914) | BB40 | 5 |
| McCook aerial view (c1885) | BB37 | 66 |
| McCook B&MR roundhouse and turntable views (c1892, c1901) | BB44 | 82 |
| McCook depot - full article | BB37 | 66 |
| McCook depot buildings map | BB37 | 69 |
| McCook depot detail drawings (5/25) | BB37 | 70 |
| McCook depot drawing | BB37 | 69 |
| McCook depot plans (6/26) | BB37 | 68 |
| McCook service building (4/35) | BB37 | 71 |
| McCook wooden coaling tower (c1938) | BB21 | 16 |
| McDonough Refrigerator Line billboard reefer drawings | BB28 | 42 |
| McIlhaney Creamery Co. billboard reefer drawings | BB28 | 29 |
| McLean, Ne. (1907/1968) | BB27 | 29 |
| McMullan Brothers Inc billboard reefer drawing | BB28 | 31 |
| Meal preparation D&RGW dining car Expo Flyer | BB42 | 229 |
| Measured Mile sign | DS10 | 99 |
| Meat packing companies and BREX reefers (Z 92-9, Z 26) | Z 26 | |
| Mediapolis, Io. depot (c1910) | BB30 | 32 |
| Mediapolis-Washington timetable (4/44) | BB30 | 57 |
| Medicine Crow (Native American chief) CB&Q postcard (c1904) | Z 57 | 21+ |
| Members List update | Z 25 | 17 |
| Men Working sign for use on Highway & Railroad Repairs | DS10 | 62 |
| Mendinah Shrine Temple special (1963) | BB22 | 17 |
| Mendota coal chute & tower (10/56) | C 98 | 2 |
| Mendota coaling tower (6/60) | Z 55 | 8+ |
| Mendota depot and museum (1977) | Z 37 | 14+ |
| Mendota, Il. signal bridge (1956) | C 89 | 18 |
| Mendota - Savanna iron ore traffic (Z 92-13, Z 27) | Z 29 | |
| Merchants Biscuit Co. billboard reefer drawings | BB28 | 36 |
| Mercury drawing room-parlor #4628 CP | BB22 | 8 |
| Merrill, Io. GN (11/37) | BB27 | 28 |
| Metal Sign post | DS10 | 1 |
| Metra "Injun Joe" (F-59 #193) Aurora Meet Special (9/99) | Z 41 | 3+ |
| Metropolis boats Isabella, North Star | BB35 | 182-4 |
| Metropolis bridge approach spans | BB35 | 180 |
| Metropolis bridge first train (12/17) | BB35 | 174 |
| Metropolis Bridge Paducah & Illinois Railroad (2001) | Z 45 | 4+ |
| Metropolis flooding (1937) | BB35 | 178 |
| Metropolis freighthouse | BB35 | 177 |
| Metropolis incline tracks | BB35 | 184-5 |
| Metropolis passenger depot plans | BB35 | 176 |
| Metropolis passenger depots (3/18) | BB35 | 176 |
| Metropolis track diagram (1960) | BB35 | 169 |
| Metropolis truss bridge construction (1915-17) | BB35 | 171-4 |
| Metropolis valuation map (18917) | BB35 | 168 |
| Metropolis water tank (7/51) | BB35 | 180 |
| Metropolis yard (12/18) | BB35 | 168 |
| Mexican work gang Oxford, Ne. (1943) | Z 50 | 10D |
| Meyer Mine renaming (8/65) | BB39 | 32 |
| Meyer, F. freight agent, Centralia (8/65) | BB39 | 32 |
| Meyer, M.M., Casper Master Carpenter B & B (c1933) | BB39 | 28 |
| Midland Pacific Railway company short history | Z 49 | 14 |
| Midwest #10 Stockton Terminal & Eastern (ex Q #9121) | BB 6 | 12 |
| Midwest #9121 Hamilton BP (8/34) | BB 6 | 14 |
| Midwest #9121 Lincoln (1939) | BB 6 | 12 |
| Midwest #9121 Omaha (c1937) | BB 6 | 11-12 |
| Midwest #9121 under construction & internal view | BB 6 | 13 |
| Midwest #9121-3 | BB 6 | 11-17 |
| Midwest #9121-3 plans | BB 6 | 14 |
| Midwest #9122 “F” on hood Lincoln (4/54) | BB 6 | 15 |
| Midwest #9122 Lincoln (9/35) | BB 6 | 15 |
| Midwest #9122 Nebraska City (9/48) | C 01 | 6 |
| Midwest #9122 Payne, Io. (9/48) | BB 6 | 15 |
| Midwest #9123 Aurora (1935) | BB 6 | 4 |
| Midwest #9123 Aurora (c1937) | BB 6 | 16 |
| Midwest #9123 bell hidden (4/63) | BB 6 | 17 |
| Midwest #9123 carbody louvers, bell moved (2/51) | BB 6 | 17 |
| Midwest #9123 Galesburg roundhouse (6/63) | BB 6 | 17 |
| Mile post plan (1/26) | DS 8 | 6 |
| Mile post plan C&S | DS 8 | 7 |
| Mile Post sign | DS10 | 45 |
| Mileposts, concrete (Z Q&A 93-5, Z 28) | Z 29-32 | |
| Milk and cream cars - full article | BB16 | 48 |
| Milk and cream cars roster | BB16 | 58 |
| Milk and cream loading (c1945) | BB16 | 53 |
| Milk and express freight loading into baggage car | C 00 | 4 |
| Milk car #949 Aurora (c1910) | BB16 | 48 |
| Milk car #949 Aurora (c1910) | BB37 | 45 |
| Milk car #951 (Z Q&A 04-7, Z 49) | Z 49 | |
| Milk car #951 Stirling (c1910) | BB16 | 49 |
| Milk car #951 (ex reefer #39901) Sterling, Co. (7/27) | BB12 | 5 |
| Milk car #951 and model | Z 49 | 16 |
| Milk cans on trolley Nodaway, Ia. depot (1948) | C 11 | 18 |
| Minden, Ne. depot (as BNSF) (2006) | Z 54 | 2+ |
| Mine equipment trailer | BB35 | 208 |
| Minerville depot Ft.MF&W (c2008) | Z 58 | 10+ |
| Mines Bureau rescue training car #5 (c1925) | BB34 | 83 |
| Minneapolis baggage-club #570 (later #500) (1897) | BB17 | 48 |
| Minneapolis bridge (5/68) | BB10 | 43 |
| Minneapolis yards (5/37) | BB13 | 22 |
| Minnehahta, SD, Hot Springs wye | BB34 | 4 |
| Minnehahta, SD, water tank | BB34 | 38, 46 |
| Minnekahda Club salon-bedroom (Z Q&A 98-16, Z 39) | Z 39 | |
| Minnisota Club lounge car (Z Q&A 98-16, Z 39) | Z 39 | |
| Minnesota Railfan Association special (10/59) | C 96 | 14+ |
| Minnetonka loco Northern Pacific (0-4-0T) exhibition engine (10/48) | BB45 | 55 |
| Mississippi flood Burlington (1965) | BB23 | 115 |
| Mississippi levee (c1865) | BB23 | 15-6 |
| Mississippi observation lounge #340 history | BB42 | 247 |
| Mississippi observation-parlor Naperville wreck (4/46) | BB42 | 172-7 |
| Mississippi obs-lounge (as Denver/Cheyenne) Zephyr Connection (1/37) | BB42 | 251 |
| Mississippi obs-parlor-lounge #340 plan | BB42 | 250 |
| Mississippi Palisades State Park (c1961) | C 97 | 2 |
| Mississippi River bank, Hastings, Mn. (7/48) | C 89 | 1 |
| Mississippi River Commission marker Diamond Bluff (c2002) | Z 46 | 4 |
| Mississippi River office car Mendota (1994) | Z 31 | 12+ |
| Missouri bridges South Sioux City | BB27 | 8-9 |
| Missouri River bridge, Plattsmouth, construction (1880) | BB16 | 16 |
| Missouri River bridges, Plattsmouth, Ne. (1965) | C 92 | 14 |
| Missouri Limited name change (Z Q&A 93-12, Z 29) | Z 29/31 | |
| Missouri loco #35 (replica) renamed, re-lettered as H&StJ (c1951) | BB45 | 72 |
| Missouri loco (H&StJ) (0-4-0) | BB45 | 7 |
| Missouri Tower sleeper part history | BB42 | 246 |
| Mixed freight train, classical branch line consist | BB30 | 69 |
| Mixed gauge track, Denver (c1922) | C 90 | 6 |
| Mixed gauge train B&W / B&NW (1902) | BB30 | 23 |
| Mobile agency van, Osmond (1968) | BB27 | 19 |
| Model designation plates (Z Q&A 92-20, Z 27) | Z 27 | |
| Modelling article - dynamometer #204725 | Z 59 | 17 |
| Modelling article – express baggage car (BE-1) | Z 61 | 20 |
| Modelling article – loco #6308 (M-3) | Z 56 | 9 |
| Modelling article - observation car #638-640 | Z 60 | 12+ |
| Modelling article - pile driver #204613 | Z 58 | 15 |
| Modelling article – powered express baggage car | Z 61 | 20 |
| Modelling article – RPO-baggage #2752 | Z 57 | 10 |
| Modelling article – simulated stainless steel / shadow lining | Z 61 | 22 |
| Modern Americans – rebuilt 4-4-0 locos – full article | BB45 | |
| Moffat Tunnel car washer effect Expo Flyer (2/41) | BB42 | 97 |
| Moffat Tunnel car washers (1948) | BB42 | 99 |
| Moffat Tunnel dome car washer diagram (1948) | BB42 | 198 |
| Moffat Tunnel history | BB42 | 15 |
| Moffat Tunnel joint route adverts | BB42 | 19 |
| Moffat Tunnel postcard Zephyr (6/34) | BB43 | 22 |
| Moffat Tunnel west portal (2/49) | BB42 | 219 |
| Molasses tank cars | BB 2 | 7 |
| Moline, Il. bus depot (12/41) | BB24 | 54 |
| Moline E-unit assignments trains #45, 47, 48 & 52 (Z Q&A 05-16, Z 51) | Z 51 | |
| Moline, Il. station (postcard) | Z 51 | 1+ |
| Moline, Il. track plan (4/64) | Z 49 | 3 |
| Monarch Brewing Co. billboard drawings and model | BB28 | 14 |
| Monmouth signal tower | Z 35 | 16 |
| Monmouth signal tower (Z 96-9, Z 35) | Z 35/36 | |
| Monmouth signal tower, paint (Z Q&A 97-3, Z 36) | Z 37 | |
| Montana & Wyoming track expansion map (c1914) | BB37 | 36 |
| Montana Centennial Train, Moline Il. (1974) | Z 51 | 3 |
| Montevideo depot | Z 34 | 10 |
| Montgomery, Il. elevator Burlington Route billboard | BB25 | 31 |
| Montgomery, Il. stock yards barn views and plans (1945) | BB25 | 30-1 |
| Montgomery, Il. stock yards track plan | BB25 | 28-9 |
| Morning report C&S Northern Division (1/36) | BB41 | 57 |
| Morning Zephyr Naperville (1949) | C 99 | 14+ |
| Morning Zephyr train #21 Sugar Grove depot (4/62) | C 03 | 8+ |
| Morning Zephyr train #22 (7/65) | C 03 | 16+ |
| Morning Zephyr Wyalusing, Wi. (7/48) | C 90 | 1 |
| Morrell & Co. billboard reefer drawings | BB28 | 50 |
| Morrill, Ne. stock yards fencing detail (1953) | BB25 | 18 |
| Motive Power Transition photo | BB45 | 78+ |
| Motor car #62 B-RI (c1937/49) | BB19 | 32 |
| Motor car #63 B-RI Dallas (1940) | BB 8 | 12 |
| Motor car #63 B-RI towing Sam Houston Zephyr | BB19 | 32 |
| Motor car #63 T&BV Dallas (1/38) | BB19 | 19 |
| Motor car #401 C&S Fort Collins (6/35) | BB 8 | 12 |
| Motor car #450 (9/29) | BB 3 | 12 |
| Motor car #507 restored Cape Charles (5/09) | Z 59 | 28+ |
| Motor car #507 restored at Minerville FtMF&W (c1908) | Z 58 | 10+ |
| Motor car #507 restored Ft Madison (1996) | Z 33 | 12 |
| Motor car #507 restored Ft Madison (1999) | Z 40 | 1/2+ |
| Motor car #588 Lincoln (c1928) | BB37 | 76 |
| Motor car #9099 Bachman model (Z Q&A 98-8, Z 37) | Z 38 | |
| Motor car #9502 as a cabin, demolished Hannibal (2010) | Z 60 | 25+ |
| Motor car #9502 number board Hannibal (2010) | Z 60 | 25+ |
| Motor car #9529 & car #1655 New Market, Io. (7/35) | BB 3 | 11 |
| Motor car #9570 St Louis (8/32) | BB 3 | 14 |
| Motor car #9729 Ashland, Ne. (8/33) | BB 3 | 14 |
| Motor car #9729 train #16 Winnebago, Ne. (9/41) | BB27 | 46 |
| Motor car #9730 Lincoln, Ne. depot (1948) | C 11 | 24/28 |
| Motor car #9730 Wymore (3/48) | C 01 | 4 |
| Motor car #9731 awaiting scrapping Burlington (1954) | BB26 | 72 |
| Motor car #9732 & coach #5471 Villisca, Io. (6/39) | BB 3 | 14 |
| Motor car #9733 Litchfield (10/47) | BB35 | 154 |
| Motor car #9734 Des Moines (9/31) | BB 3 | 12 |
| Motor car #9735 (1963) | BB15 | 3 |
| Motor car #9766 & trailer Peoria-Des Moines (7/40) | BB23 | 66 |
| Motor car #9767 & trailer Edgemont (9/33) | BB 9 | 11 |
| Motor car #9767 BP (10/30) | BB27 | 46 |
| Motor car #9767 silver & Silver Pendulum #6000 (12/60) | BB 8 | 12 |
| Motor car #9768 & coach-baggage Billings (5/34) | BB 3 | 10 |
| Motor car #9768 & SW-1 #9143 Altvan, Wy. (c1956) | C 00 | 2 |
| Motor car #9768 pushing wedge plow Cheyenne (3/59) | BB38 | 113+ |
| Motor car #9770 train #27/28 Des Moines (c1952) | Z 49 | 10A |
| Motor car #9772 Burlington Shops (9/65) | BB26 | 75+ |
| Motor car #9772 Lincoln (6/60) | C 01 | 10 |
| Motor car #9772 Peoria (5/58) | BB 8 | 12 |
| Motor car #9814 last day B&W operation (9/34) | BB30 | 50/60 |
| Motor car #9814-6 (Z Q&A 92-8, Z 26) | Z 26 | |
| Motor car #9815 pilot plow Yorktown (12/35) | BB38 | 63 |
| Motor car #9816 Burlington depot (c1954) | BB23 | 97+ |
| Motor car #9816 Burlington yards (8/52) | BB23 | 66 |
| Motor car #9816 Burlington-Quincy (8/52) | BB23 | 97 |
| Motor car #9816 Litchfield (9/55) | BB35 | 158+ |
| Motor car #9817 partially restored Denver (1993) | BB28 | 3 |
| Motor car #9838 Virden depot (5/48) | BB35 | 154 |
| Motor car #9839 Centralia (4/40) | BB35 | 153 |
| Motor car #9841 Burlington (7/48) | BB23 | 96 |
| Motor car #9841 Burlington depot (5/48) | C 11 | 14 |
| Motor car #9843 Centralia (6/39) | BB35 | 153 |
| Motor car #9844 Beardstown depot (5/55) | BB35 | 156+ |
| Motor car #9844 Christopher depot (5/55) | BB35 | 156 |
| Motor car #9844 Herrin Junction water tower (6/55) | BB35 | 157 |
| Motor car #9844 last run (4/57) | BB35 | 159-61+ |
| Motor car #9844 rear view Herrin (4/57) | BB35 | 159 |
| Motor car #9844 Shattuc (9/54) | BB35 | 155 |
| Motor car #9844 train #11/12 (10/52) | BB35 | 155 |
| Motor car #9844 unloading mail Shattuc (9/54) | BB35 | 157 |
| Motor car #9844 unloading mail West Frankfort (4/56) | BB35 | 157 |
| Motor car #9845 Creston (1957) | BB11 | 30 |
| Motor car #9845 Maryville (9/57) | BB 8 | 12 |
| Motor car #9849 (6/42) | Z 48 | 11 |
| Motor car #9849 Burlington (5/55) | C 90 | 18 |
| Motor car #9849 Burlington-Quincy (10/56) | BB23 | 96 |
| Motor car #9849 Streator, Il.(10/49) | C 91 | 20 |
| Motor car #9849 train #41/42 Rochelle (6/48) | Z 49 | 15 |
| Motor car #9849 train 41/42 (Z Q&A 04-4, Z 48) | Z 49 | |
| Motor car #9852 under tow Red Oak (3/41) | BB 6 | 25 |
| Motor car #9853 Red Oak (1/37) | BB 3 | 14 |
| Motor car #M-41 UP Lincoln (11/47) | BB37 | 84 |
| Motor car house (MoW toolhouse) Metropolis | BB35 | 195+ |
| Motor car on Fox River Bridge | BB 3 | 16 |
| Motor car restriction, cinder pit, sign plan C&S (9/29) | DS 8 | 20 |
| Motor car roster and assignments Jan. 1931 | BB 3 | 15 |
| Motor car shed plans | BB15 | 24 |
| Motor car, track inspection, examination certificate (1949) | Z 50 | 10C |
| Motor car, track inspection, with home-built body (1943) | Z 50 | 10B |
| Motor cars, Black Hills S.D. (Z Q&A 00-12, Z 43) | Z 43 | |
| Motor cars Aurora - Streator (Z Q&A 96-11, Z 35) | Z 35/36 | |
| Motor cars - “Railway Age” article (2/31) | BB 3 | 10 |
| Motor cars Sedan - Carrolton (Z Q&A 92-14, Z 27) | Z 28 | |
| Motorised handcars Aurora track elevation construction (c1922) | BB46 | 24 |
| Motors as a term for diesel units (Z Q&A 01-6, Z 45) | Z 45 | |
| Mount class dining car D&RGW plan | BB42 | 238 |
| Mount class observation lounge D&RGW drumhead signs (c1935) | BB42 | 259 |
| Mount class observation lounge D&RGW interior (c1935) | BB42 | 259 |
| Mount Rushmore CB&Q postcard (c1938) | Z 57 | 27+ |
| MoW - see also type (e.g. Wrecker) or function (e.g. Sand service) | | |
| MoW - includes company service equipment | | |
| MoW #207606 (ex XM-23) Denver (4/68) | Z 49 | 18+ |
| MoW #209003 (ex XM-23) Galesburg (10/69) | Z 49 | 18 |
| MoW #209011 (ex XM-23) Ashland, Ne. | Z 49 | 18 |
| MoW #209609 bunk car ex box car on Eola scrapline (8/30) | BB45 | 46 |
| MoW #211581 rail protective coating spray unit Waterman, Il. (1936) | Z 55 | 24 |
| MoW #250051 (ex Riverview) rip track lunchroom Lincoln (9/62) | BB42 | 252 |
| MoW #250056 (ex BA-19A #1032) | BB36 | 54+ |
| MoW #250058 (ex BA-19A #1044) | BB36 | 54+ |
| MoW #976100 BN (ex BA-19A #1031) (4/80) | BB36 | 55+ |
| MoW #976106 BN (ex BA-19A #1020) (1981/3) | BB36 | 55 |
| MoW #976107 BN (ex BA-19A #1028) | BB36 | 55+ |
| MoW #976108 BN (ex BA-19A #1030) red paint | BB36 | 55+ |
| MoW baggage BN (ex BA-19A), no numbers | BB36 | 54+ |
| MoW base Christopher | BB35 | 195 |
| MoW BN red paint scheme | BB36 | 55+ |
| MoW box cars “dining car” Seneca (1946) | BB 9 | 24 |
| MoW bunk cars (ex box cars) Red Oak (10/38) | BB25 | 122 |
| MoW cars C&S Childress, Tx. Depot (c1960) | Z 54 | 17 |
| MoW cars ex box mineral red Buda (c1945) | BB41 | 88 |
| MoW electronic equipment car (ex baggage) | BB36 | 54+ |
| MoW equipment and trains Burlington (5/44) | BB23 | 90-91 |
| MoW flat car, truss rod, (c1912) | BB34 | 21 |
| MoW gang toolhouse Metropolis | BB35 | 195+ |
| MoW orange paint (Z Q&A 93-3, Z 28) | Z 28 | |
| MoW outfit box cars WP (8/39) | BB42 | 56 |
| MoW rail spray train loco #5106 (O-1) Waterman, Il. (1936) | Z 55 | 24 |
| MoW train at Quincy (c1948) | C 89 | 20 |
| MoW train rail brine protection (Z Q&A 07-07, Z 55) | Z 55 | |
| MoW train Campstool (2/55) | BB38 | 98 |
| MoW water tank auxiliary cars (Z Q&A 90-12, Z 23) | Z 23 | |
| Mt Ayr depot restoration news (c2002) | Z 46 | 5 |
| Mt Doane observation car WP | BB42 | 262 |
| Mt Massive dining car D&RGW kitchen interior views (c1945) | BB42 | 129 |
| Mt Massive dining car/lounge D&RGW Expo Flyer Feather River Canyon | BB42 | 242 |
| Mt Massive observation lounge D&RGW Scenic Limited Pueblo (4/37) | BB42 | 259 |
| Mt Pleasant, IA Depot (2008) | Z 58 | 6+ |
| Mt Pleasant, IA stock yards construction plans (5/47) | BB25 | 22-3 |
| Mt Princeton dining car D&RGW interior views (c1945) | BB42 | 129 |
| Mt Union, IA depot and elevator | BB30 | 38+ |
| Mt Yale dining car/lounge D&RGW | BB42 | 238 |
| Mudge GS-4 track speeder (c1939) | BB35 | 194 |
| Munitions train (Z Q&A 98-3, Z 37) | Z 37 | |
| Mural B&MR 4-4-0, Lincoln | BB22 | 3 |
| Mural, Naperville (1998) | Z 39 | 18+ |
| Murphy, Harry C. donating loco S-4 ‘s | BB33 | 144/148 |
| Murphy, Harry CB&Q president Burlington (5/61) | BB23 | 113 |
| Murphy, Harry CB&Q president New Denver Zephyr inauguration (10/56) | C 05 | 22 |
| Murray Iron Works, Burlington (10/61) | BB23 | 101 |
| Murray Iron Works, Burlington | BB26 | 16 |