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
- 315 more...
- Itemimg744 - Great Northern Covered Hopper Car 71731, undated
- Itemimg745 - Great Northern Covered Hopper Car 71806, undated
- Itemimg746 - Great Northern Covered Hopper Car 71856, undated
- Itemimg747 - Great Northern Covered Hopper Car 71995 at Bellingham, Washington, 1992
- Itemimg748 - Great Northern Covered Hopper Car 170019 at Albuquerque, New Mexico, 1985
- Itemimg749 - Great Northern Covered Hopper Car 170072 at Pasco, Washington, 1986
- Itemimg750 - Great Northern Covered Hopper Car 170062 at Albuquerque, New Mexico, 1979
- Itemimg751 - Great Northern Covered Hopper Car 170074 at Albuquerque, New Mexico, 1990
- Itemimg752 - Great Northern Covered Hopper Car 170092 at Longmont, Colorado, 1980
- 195 more...