Railroad Archives Online
- CollectionD0036 - George Werkema Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3003 - Freight Cars
- 125 more...
- ItemWerkema228 - Northern Pacific wood chip car 119853 at Pasco, Washington, in 1990.
- ItemWerkema229 - Northern Pacific wood chip car 119853 at Priest River, Idaho, in 1990.
- ItemWerkema230 - Northern Pacific wood chip car 119854 at Pasco, Washington, in 1981.
- ItemWerkema231 - Northern Pacific wood chip car 119869 at Pasco, Washington, in 1992.
- ItemWerkema232 - Northern Pacific wood chip car 119828 at Attalia, Washington, in 1986.
- ItemWerkema233 - Northern Pacific wood chip car 119933 at Pasco, Washington, in 1981.
- ItemWerkema234 - Northern Pacific wood chip car 582517 at Priest River, Idaho, in 1990.
- ItemWerkema235 - Northern Pacific wood chip car 582531 at Albuquerque, New Mexico, in 1995.
- ItemWerkema236 - Northern Pacific wood chip car 582536 at Pasco, Washington, in 1983.
- 89 more...