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 3003 - Freight Cars
- 35 more...
- Itemimg450 - Great Northern Boxcar 27556 at Bellingham, Washington, 1977
- Itemimg451 - Great Northern Boxcar 31388 at Denver, Colorado, 1965
- Itemimg452 - Great Northern Boxcar 32134 at Boulder, Colorado, 1967
- Itemimg453 - Great Northern Boxcar 32229 at Bellingham, Washington, 1966
- Itemimg454 - Great Northern Boxcar 33017 at Albuquerque, New Mexico, 1979
- Itemimg455 - Great Northern Boxcar 33534 at Albuquerque, New Mexico, 1979
- Itemimg456 - Great Northern Boxcar 34437 at Denver, Colorado, 1965
- Itemimg457 - Great Northern Boxcar 33706 at Albuquerque, New Mexico, 1980
- Itemimg458 - Great Northern Boxcar 39447, 1980
- 475 more...