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
- 16 more...
- Itemimg295 - Great Northern Passenger Car 577 at Lewistown, Montana, 1965
- Itemimg296 - Great Northern Passenger Car 577 at Lewistown, Montana, 1965
- Itemimg297 - Great Northern Passenger Car 902, undated
- Itemimg298 - Great Northern Passenger Car 964, undated
- Itemimg299 - Great Northern Passenger Car 1073, undated
- Itemimg300 - Great Northern Passenger Car 1132 at Denver, Colorado, 1966
- Itemimg301 - Great Northern Passenger Car 1152 at Greeley, Colorado, 1975
- Itemimg302 - Great Northern Passenger Car 1162 at Denver, Colorado, 1966
- Itemimg303 - Great Northern Passenger Car 1173, undated
- 18 more...