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
- 76 more...
- ItemWerkema179 - Northern Pacific box car 42284 at Denver, Colorado, in 1976.
- ItemWerkema180 - Northern Pacific box car 43144 in a train in 1976.
- ItemWerkema181 - Northern Pacific box car 46030 at Albuquerque, New Mexico, in 1980.
- ItemWerkema182 - Northern Pacific box car 46064 at Pasco, Washington, in 1981.
- ItemWerkema183 - Northern Pacific box car 47569 at Trinchera, Colorado, in 1981.
- ItemWerkema184 - Northern Pacific box car 47569 at Trinchera, Colorado, in 1981.
- ItemWerkema185 - Northern Pacific box car 47569 at Trinchera, Colorado, in 1981.
- ItemWerkema186 - Northern Pacific box car 49170 at Albuquerque, New Mexico, in 1980.
- ItemWerkema187 - Northern Pacific box car 49184 at Amarillo, Texas, in 1980.
- 138 more...