Railroad Archives Online
- CollectionD0036 - George Werkema 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
- 38 more...
- Itemimg317 - Great Northern Passenger Car 1335, undated
- Itemimg318 - Great Northern Passenger Car 1384 at Bellevue, Ohio, 1991
- Itemimg319 - Great Northern Passenger Car 2628, undated
- Itemimg320 - Great Northern Passenger Car 2636, 1970
- Itemimg321 - Great Northern Observation Car, undated