Railroad Archives Online
- FondsE0298 - Cordell Newby Photograph Collection
- Cyfres003 - Great Northern Railway Company (U.S.)
- Is-gyfres014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 004 - Railroad passenger cars
- 99 mwy...
- EitemCNBk3img458 - Great Northern Railway Postal Car 222, Storage Mail Car.
- EitemCNBk3img459 - Great Northern Railway Postal Car 225, Storage Mail Car.
- EitemCNBk3img460 - Great Northern Railway Postal Car 228, Storage Mail Car.
- EitemCNBk3img461 - Great Northern Railway Postal Car 237.
- EitemCNBk3img462 - Great Northern Railway Postal Car 237.
- EitemCNBk3img463 - Great Northern Railway Postal Car 237, Storage Mail Car.
- EitemCNBk3img464 - Great Northern Railway Postal Car 237, Storage Mail Car.
- EitemCNBk3img465 - Great Northern Railway Postal Car 251, Storage Mail Car at Seattle, Washington in 1972.
- EitemCNBk3img466 - Great Northern Railway Postal Car 253, Storage Mail Car.
- 161 mwy...