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
- 143 more...
- Itemimg558 - Great Northern Boxcar 36316 at Denver, Colorado, 1966
- Itemimg559 - Great Northern Boxcar 36573 at Wenatchee, Washington, undated
- Itemimg560 - Great Northern Boxcar 36616, undated
- Itemimg561 - Great Northern Boxcar 37001 at Albuquerque, New Mexico, 1980
- Itemimg562 - Great Northern Boxcar 37035 at Albuquerque, New Mexico, 1978
- Itemimg563 - Great Northern Boxcar 37162 at Albuquerque, New Mexico, 1978
- Itemimg564 - Great Northern Boxcar 37202 at Albuquerque, New Mexico, 1980
- Itemimg565 - Great Northern Boxcar 37304 at Denver, Colorado, 1980
- Itemimg566 - Great Northern Boxcar 37515 at Denver, Colorado, 1965
- 367 more...