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
- 503 more...
- Itemimg932 - Great Northern Flatcar 66066 at Boulder, Colorado, 1965
- Itemimg933 - Great Northern Flatcar 67291 at Issaquah, Washington, 1992
- Itemimg934 - Great Northern Flatcar 68604 at Pasco, Washington, 1981
- Itemimg935 - Great Northern Flatcar 68609 at Pasco, Washington, 1981
- Itemimg936 - Great Northern Flatcar 69730 at Boulder, Colorado, 1965
- Itemimg937 - Great Northern Flatcar 160026 at Longmont, Colorado, 1985
- Itemimg938 - Great Northern Flatcar 160028 at Pasco, Washington, 1983
- Itemimg939 - Great Northern Flatcar 160371 at Albuquerque, New Mexico, 1980
- Itemimg940 - Great Northern Flatcar 160704 at Bellingham, Washington, 1966
- 7 more...