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
- 45 more...
- ItemWerkema148 - Northern Pacific box car 8665 at Longmont, Colorado, in 1978.
- ItemWerkema149 - Northern Pacific box car 8836 at Albuquerque, New Mexico, in 1978.
- ItemWerkema150 - Northern Pacific box car 8876 at Albuquerque, New Mexico, in 1978.
- ItemWerkema151 - Northern Pacific box car 8876 at Albuquerque, New Mexico, in 1978.
- ItemWerkema152 - Northern Pacific box car 8969 at Albuquerque, New Mexico, in 1978.
- ItemWerkema153 - Northern Pacific box car 9053 at Ferndale, Washington, in 1977.
- ItemWerkema154 - Northern Pacific box car 9132 at Albuquerque, New Mexico, in 1978.
- ItemWerkema155 - Northern Pacific box car 9197 at Albuquerque, New Mexico, in 1979.
- ItemWerkema156 - Northern Pacific box car 15529 at Denver, Colorado, in 1965.
- 169 more...