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
- 113 more...
- ItemCNBk3img472 - Great Northern Railway Postal Car 203.
- ItemCNBk3img473 - Great Northern Railway Postal Car 270, Baggage/Express/Storage Mail Car at Seattle, Washington in 1972.
- ItemCNBk3img474 - Great Northern Railway Postal Car 271, Baggage/Express/Storage Mail Car.
- ItemCNBk3img475 - Great Northern Railway Postal Car 274, Baggage/Express/Storage Mail Car at Tacoma, Washington in 1972.
- ItemCNBk3img476 - Great Northern Railway Postal Car 275 at Chicago, Illinois in 1970.
- ItemCNBk3img477 - Great Northern Railway Postal Car 276, REA Baggage/Express/Storage Mail Car.
- ItemCNBk3img478 - Great Northern Railway Postal Car 277, Storage Mail Car at Seattle, Washington in 1972.
- ItemCNBk3img479 - Great Northern Railway Postal Car 279, Storage Mail Car at Tacoma, Washington in 1972.
- ItemCNBk3img480 - Great Northern Railway Postal Car 303, Baggage/Express/Storage Mail Car at Minneapolis, Minnesota in 1973.
- 147 more...