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
- 43 more...
- 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.
- ItemCNBk3img324 - Great Northern Railway Postal Car 42, Railway Post Office Car at Seattle, Washington in 1972.
- ItemCNBk3img325 - Great Northern Railway Postal Car 42, Railway Post Office Car at Seattle, Washington in 1972.
- ItemCNBk3img326 - Great Northern Railway Postal Car 44, Railway Post Office Car at Seattle, Washington in 1972.
- ItemCNBk3img327 - Great Northern Railway Postal Car 45, Railway Post Office Car at St. Paul, Minnesota in 1973.
- ItemCNBk3img328 - Great Northern Railway Heater Car HC9 at Spokane, Washington in 1972.
- ItemCNBk3img329 - Great Northern Railway Heater Car HC4 Heater Car.
- 217 more...