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
- 81 more...
- 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.
- ItemWerkema188 - Northern Pacific 50-foot, single plug door refrigerator car 96017 at Albuquerque, New Mexico, in 1992.
- ItemWerkema189 - Northern Pacific 50-foot, single plug door refrigerator car 96068 at Albuquerque, New Mexico, in 1978.
- ItemWerkema190 - Northern Pacific 50-foot, single plug door refrigerator car 96069 at Pasco, Washington, in 1981.
- ItemWerkema191 - Northern Pacific 50-foot, single plug door refrigerator car 96079 at Prosser, Washington, in 1986.
- ItemWerkema192 - Northern Pacific 50-foot, single plug door refrigerator car 96079 at Yakima, Washington, in 1992.
- 133 more...