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
- 155 more...
- Itemimg570 - Great Northern Boxcar 37645 at Albuquerque, New Mexico, 1979
- Itemimg571 - Great Northern Boxcar 37719 at Albuquerque, New Mexico, 1978
- Itemimg572 - Great Northern Boxcar 37750 at Longmont, Colorado, 1980
- Itemimg573 - Great Northern Boxcar 37786 at Denver, Colorado, 1981
- Itemimg574 - Great Northern Boxcar 37787 at Albuquerque, New Mexico, 1980
- Itemimg575 - Great Northern Boxcar 37842 at Albuquerque, New Mexico, 1978
- Itemimg576 - Great Northern Boxcar 37854 at Albuquerque, New Mexico, 1978
- Itemimg577 - Great Northern Boxcar 37870 at Sais, New Mexico, 1982
- Itemimg578 - Great Northern Boxcar 36822 at Denver, Colorado, 1965
- 355 more...