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
- 86 more...
- 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.
- ItemWerkema193 - Northern Pacific 50-foot, single plug door refrigerator car 96086 at Albuquerque, New Mexico, in 1990.
- ItemWerkema194 - Northern Pacific 50-foot, single plug door refrigerator car 96086 at Albuquerque, New Mexico, in 1991.
- ItemWerkema195 - Northern Pacific 50-foot, single plug door refrigerator car 96091 at Plainview, Texas, in 1985.
- ItemWerkema196 - Northern Pacific 50-foot, single plug door refrigerator car 96097 at Clovis, New Mexico, in 1984.
- ItemWerkema197 - Northern Pacific 50-foot, single plug door refrigerator car 96099 at Las Vagas, New Mexico, in 1984.
- 128 more...