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
- 72 more...
- Itemimg487 - Great Northern Boxcar 3658 at Denver, Colorado, 1980
- Itemimg488 - Great Northern Boxcar 3779 at Boulder, Colorado, 1963
- Itemimg489 - Great Northern Boxcar 3840 at Albuquerque, New Mexico, 1978
- Itemimg490 - Great Northern Boxcar 3840 at Albuquerque, New Mexico, 1978
- Itemimg491 - Great Northern Boxcar 3879 at Albuquerque, New Mexico, 1978
- Itemimg492 - Great Northern Boxcar 3879 at Albuquerque, New Mexico, 1978
- Itemimg493 - Great Northern Boxcar 4121 at Denver, Colorado, 1967
- Itemimg494 - Great Northern Boxcar 14218 at Denver, Colorado, 1967
- Itemimg495 - Great Northern Boxcar 15116 at Coal Creek, Colorado, 1965
- 438 more...