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
- 262 more...
- Itemimg691 - Great Northern Hopper Car 70031 at Wishram, Washington, 1988
- Itemimg692 - Great Northern Hopper Car 70064 at Albuquerque, New Mexico, 1978
- Itemimg693 - Great Northern Hopper Car 70064 at Albuquerque, New Mexico, 1980
- Itemimg694 - Great Northern Hopper Car 70064 at Albuquerque, New Mexico, 1980
- Itemimg695 - Great Northern Hopper Car 70143 at Longmont, Colorado, 1981
- Itemimg696 - Great Northern Hopper Car 70179 at Albuquerque, New Mexico, 1979
- Itemimg697 - Great Northern Hopper Car 70226 at Trinidad, Colorado, 1990
- Itemimg698 - Great Northern Hopper Car 70238 at Longmont, Colorado, 1990
- Itemimg699 - Great Northern Hopper Car 70238 at Trinidad, Colorado, 1990
- 248 more...