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
- 417 more...
- 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
- Itemimg850 - Great Northern Covered Hopper Car 172561 at Albuquerque, New Mexico, 1989
- Itemimg851 - Great Northern Covered Hopper Car 172571 at Amarillo, Texas, 1992
- Itemimg852 - Great Northern Covered Hopper Car 172621 at Pasco, Washington, 1988
- Itemimg853 - Great Northern Covered Hopper Car 172632 at Denver, Colorado, 1990
- Itemimg854 - Great Northern Covered Hopper Car 172691 at Denver, Colorado, 1971
- 93 more...