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
- 412 more...
- Itemimg841 - Great Northern Covered Hopper Car 172451 at Albuquerque, New Mexico, 1978
- Itemimg842 - Great Northern Covered Hopper Car 172455 at Pasco, Washington, 1984
- Itemimg843 - Great Northern Covered Hopper Car 172461 at McCook, Nebraska, 1990
- Itemimg844 - Great Northern Covered Hopper Car 172462 at McCook, Nebraska, 1990
- Itemimg845 - Great Northern Covered Hopper Car 172498 at Trinidad, Colorado, 1990
- Itemimg846 - Great Northern Covered Hopper Car 172535 at Longmont, Colorado, 1980
- Itemimg847 - Great Northern Covered Hopper Car 172552 at Hatton, Washington, 1988
- Itemimg848 - Great Northern Covered Hopper Car 172552 at Pasco, Washington, 1988
- Itemimg849 - Great Northern Covered Hopper Car 172557 at Amarillo, Texas, 1980
- 98 more...