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
- 41 more...
- 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
- Itemimg459 - Great Northern Boxcar 39705 at Pasco, Washington, 1982
- Itemimg460 - Great Northern Boxcar 44653 at Benchland, Montana, 1965
- Itemimg461 - Great Northern Boxcar 48820 at Denver, Colorado, 1965
- Itemimg462 - Great Northern Boxcar 48827 at Boulder, Colorado, 1965
- Itemimg463 - Great Northern Boxcar 48827 at Boulder, Colorado, 1965
- Itemimg464 - Great Northern Boxcar 50545 at Denver, Colorado, 1965
- 469 more...