Railroad Archives Online
- CollectionE0298 - Cordell Newby Photograph Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3004 - Railroad passenger cars
- 37 more...
- ItemCNBk3img315 - Great Northern Railway Heater Car HC11 at St. Paul, Minnesota.
- ItemCNBk3img316 - Great Northern Railway Heater Car HC12.
- ItemCNBk3img317 - Great Northern Railway Heater Car HC13.
- ItemCNBk3img318 - Great Northern Railway Heater Car HC14 at Minneapolis, Minnesota in 1973.
- ItemCNBk3img319 - Great Northern Railway Heater Car HC15 at Livingston, Montana in 1974.
- ItemCNBk3img320 - Great Northern Railway Heater Car HC18 at Vancouver, Washington in 1971.
- ItemCNBk3img321 - Great Northern Railway Heater Car HC19.
- ItemCNBk3img322 - Great Northern Railway Postal Car 40, Railway Post Office Car at Tacoma, Washington in 1973.
- ItemCNBk3img323 - Great Northern Railway Postal Car 41, Railway Post Office Car at St. Paul, Minnesota in 1973.
- 223 more...