Railroad Archives Online
- FondiD0036 - George Werkema Collection
- Serija003 - Great Northern Railway Company (U.S.)
- Podserija014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 003 - Freight Cars
- 502 more...
- Dokumentimg931 - Great Northern Flatcar 65727 at Bushnell, Illinois, 1992
- Dokumentimg932 - Great Northern Flatcar 66066 at Boulder, Colorado, 1965
- Dokumentimg933 - Great Northern Flatcar 67291 at Issaquah, Washington, 1992
- Dokumentimg934 - Great Northern Flatcar 68604 at Pasco, Washington, 1981
- Dokumentimg935 - Great Northern Flatcar 68609 at Pasco, Washington, 1981
- Dokumentimg936 - Great Northern Flatcar 69730 at Boulder, Colorado, 1965
- Dokumentimg937 - Great Northern Flatcar 160026 at Longmont, Colorado, 1985
- Dokumentimg938 - Great Northern Flatcar 160028 at Pasco, Washington, 1983
- Dokumentimg939 - Great Northern Flatcar 160371 at Albuquerque, New Mexico, 1980
- 8 more...