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
- 162 more...
- Itemimg577 - Great Northern Boxcar 37870 at Sais, New Mexico, 1982
- Itemimg578 - Great Northern Boxcar 36822 at Denver, Colorado, 1965
- Itemimg579 - Great Northern Boxcar 36806 at Albuquerque, New Mexico, 1980
- Itemimg580 - Great Northern Boxcar 36835 at Albuquerque, New Mexico, 1980
- Itemimg581 - Great Northern Boxcar 36864 at Boulder, Colorado, 1978
- Itemimg582 - Great Northern Boxcar 36870, undated
- Itemimg583 - Great Northern Boxcar 36919 at Denver, Colorado, 1965
- Itemimg584 - Great Northern Boxcar 36922 at Albuquerque, New Mexico, 1978
- Itemimg585 - Great Northern Boxcar 36931 at Denver, Colorado, 1966
- 348 more...