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
- 89 more...
- 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.
- ItemWerkema198 - Northern Pacific 50-foot, single plug door refrigerator car 96113 at Albuquerque, New Mexico, in 1997.
- ItemWerkema199 - Northern Pacific 50-foot, single plug door refrigerator car 96120 at Plainview, Texas, in 1985.
- ItemWerkema200 - Northern Pacific 50-foot, single plug door refrigerator car 96158 at Denver, Colorado, in 1982.
- 125 more...