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
- 11 more...
- ItemWerkema114 - Northern Pacific box car 1877 in Albuquerque, New Mexico, in 1979.
- ItemWerkema115 - Northern Pacific box car 1912 in Albuquerque, New Mexico, on June 4, 1980.
- ItemWerkema116 - Northern Pacific box car 1956 in Albuquerque, New Mexico, in 1980.
- ItemWerkema117 - Northern Pacific box car 1998 in Albuquerque, New Mexico, in 1978.
- ItemWerkema118 - Northern Pacific box car 2265 in Belen, New Mexico, in 1978.
- ItemWerkema119 - Northern Pacific box car 2821 in Denver, Colorado, in 1982.
- ItemWerkema120 - Northern Pacific box car 2910 in Albuquerque, New Mexico, in 1980.
- ItemWerkema121 - Northern Pacific box car 3020 at Idaho Falls, Idaho, in 1975.
- ItemWerkema122 - Northern Pacific box car 3168 at Longmont, Colorado, in 1980.
- 203 more...