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
- 495 more...
- Itemimg924 - Great Northern Flatcar 60108 at Boulder, Colorado, 1965
- Itemimg925 - Great Northern Flatcar 60535 at Bellingham, Washington, 1977
- Itemimg926 - Great Northern Flatcar 65292 at Denver, Colorado, 1965
- Itemimg927 - Great Northern Flatcar 65707 at Castle Rock, Colorado, 1965
- Itemimg928 - Great Northern Flatcar 64547 at Denver, Colorado, 1965
- Itemimg929 - Great Northern Flatcar 64547 at Denver, Colorado, 1965
- Itemimg930 - Great Northern Flatcar 64547 at Denver, Colorado, 1965
- Itemimg931 - Great Northern Flatcar 65727 at Bushnell, Illinois, 1992
- Itemimg932 - Great Northern Flatcar 66066 at Boulder, Colorado, 1965
- 15 more...