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
- 117 more...
- ItemWerkema220 - Northern Pacific 50.5-foot, double-door box car 390044 at Bellingham, Washington, in 1982.
- ItemWerkema221 - Northern Pacific 50.5-foot, double-door box car 390066 at Bellingham, Washington, in 1982.
- ItemWerkema222 - Northern Pacific wood chip car 119503 at Pasco, Washington, in 1983.
- ItemWerkema223 - Northern Pacific wood chip car 119567 at Pasco, Washington, in 1983.
- ItemWerkema224 - Northern Pacific wood chip car 119567 at Pasco, Washington, in 1983.
- ItemWerkema225 - Northern Pacific wood chip car 119572 at Pasco, Washington, in 1983.
- ItemWerkema226 - Northern Pacific wood chip car 119694 at Pasco, Washington, in 1981.
- ItemWerkema227 - Northern Pacific wood chip car 119809 at Newcastle, Wyoming, in 1999.
- ItemWerkema228 - Northern Pacific wood chip car 119853 at Pasco, Washington, in 1990.
- 97 more...