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
- 436 more...
- Itemimg865 - Great Northern Ore Car 92290 at Denver, Colorado, 1978
- Itemimg866 - Great Northern Ore Car 95327, undated
- Itemimg867 - Great Northern Gondola 72448, undated
- Itemimg868 - Great Northern Gondola 72773 at Idaho Falls, Idaho, 1981
- Itemimg869 - Great Northern Gondola 72949 at Albuquerque, New Mexico, 1980
- Itemimg870 - Great Northern Gondola 73816 at Albuquerque, New Mexico, 1978
- Itemimg871 - Great Northern Gondola 73865 at Albuquerque, New Mexico, 1978
- Itemimg872 - Great Northern Gondola 74697 at Pasco, Washington, 1981
- Itemimg873 - Great Northern Gondola 74815, undated
- 74 more...