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
- 34 more...
- ItemWerkema137 - Northern Pacific box car 6042 at Denver, Colorado, in 1982.
- ItemWerkema138 - Northern Pacific box car number 6322 at Albuquerque, New Mexico, in 1980.
- ItemWerkema139 - Northern Pacific box car number 7836 at Albuquerque, New Mexico, in 1978.
- ItemWerkema140 - Northern Pacific box car 8056 at Bellingham, Washington, in 1977.
- ItemWerkema141 - Northern Pacific box car 8078 at Albuquerque, New Mexico, in 1979.
- ItemWerkema142 - Northern Pacific box car 8181 at Albuquerque, New Mexico, in 1979.
- ItemWerkema143 - Northern Pacific box car 8130 at Denver, Colorado, in 1978.
- ItemWerkema144 - Northern Pacific box car 8187 at Albuquerque, New Mexico, in 1978.
- ItemWerkema145 - Northern Pacific box car 8324 at Pasco, Washington, in 1981.
- 180 more...