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
- 25 more...
- Itemimg440 - Great Northern Boxcar 19164 at Denver, Colorado, 1965
- Itemimg441 - Great Northern Boxcar 20610 at Belen, New Mexico, 1980
- Itemimg442 - Great Northern Boxcar 21307 at Boulder, Colorado, 1965
- Itemimg443 - Great Northern Boxcar 21483 at Denver, Colorado, 1965
- Itemimg444 - Great Northern Boxcar 21492 at Belen, New Mexico, 1980
- Itemimg445 - Great Northern Boxcar 25478 at Park, Washington, 1977
- Itemimg446 - Great Northern Boxcar 25478 at Park, Washington, 1977
- Itemimg447 - Great Northern Boxcar 25478 at Wickersham, Washington, 1973
- Itemimg448 - Great Northern Boxcar 25478 at Wickersham, Washington, 1993
- 485 more...