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
- 430 more...
- Itemimg859 - Great Northern Covered Hopper Car 173962, undated
- Itemimg860 - Great Northern Ore Car 88909, undated
- Itemimg861 - Great Northern Ore Car 89371, undated
- Itemimg862 - Great Northern Ore Car 90756 at Denver, Colorado, 1978
- Itemimg863 - Great Northern Ore Car 91359 at Denver, Colorado, 1978
- Itemimg864 - Great Northern Ore Car 95710 95711, undated
- Itemimg865 - Great Northern Ore Car 92290 at Denver, Colorado, 1978
- Itemimg866 - Great Northern Ore Car 95327, undated
- Itemimg867 - Great Northern Gondola 72448, undated
- 80 more...