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
- Itemimg1214 - Great Northern Boxcar 138170 at Lincoln, Nebraska, 1996
- Itemimg1215 - Great Northern Boxcar at Snoqualmie, Washington, 2005
- Itemimg417 - Great Northern Boxcar 5113 at Belen, New Mexico, 1980
- Itemimg418 - Great Northern Boxcar 5287 at Albuquerque, New Mexico, 1980
- Itemimg419 - Great Northern Boxcar 5357 at Albuquerque, New Mexico, 1980
- 514 more...