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
- 308 more...
- Itemimg737 - Great Northern Covered Hopper Car 71400 at Albuquerque, New Mexico, 1978
- Itemimg738 - Great Northern Covered Hopper Car 71462 at Amarillo, Texas, 1980
- Itemimg739 - Great Northern Covered Hopper Car 71462 at Amarillo, Texas, 1980
- Itemimg740 - Great Northern Covered Hopper Car 71528 at Bellingham, Washington, 1965
- Itemimg741 - Great Northern Covered Hopper Car 71604, undated
- Itemimg742 - Great Northern Covered Hopper Car 71676 at Denver, Colorado, 1976
- Itemimg743 - Great Northern Covered Hopper Car 71708 at Pasco, Washington, 1981
- Itemimg744 - Great Northern Covered Hopper Car 71731, undated
- Itemimg745 - Great Northern Covered Hopper Car 71806, undated
- 202 more...