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
- 146 more...
- ItemWerkema249 - Northern Pacific flat car 66126 at Denver, Colorado, in 1990.
- ItemWerkema250 - Northern Pacific flat car 66133 at Albuquerque, New Mexico, in 1979.
- ItemWerkema251 - Northern Pacific flat car 66145 at Albuquerque, New Mexico, in 1978.
- ItemWerkema252 - Northern Pacific flat car 66166 at Broomfield, Colorado, in 1990.
- ItemWerkema253 - Northern Pacific flat car 66900 at Bellingham, Washington, in 1993.
- ItemWerkema254 - Northern Pacific flat car 67177 at Pasco, Washington, in 1983.
- ItemWerkema255 - Northern Pacific gondola car number 50409, at Toppenish, Washington, in 2008.
- ItemWerkema256 - Northern Pacific gondola car number 50599, at Bellingham, Washington, in 1977.
- ItemWerkema257 - Northern Pacific gondola car number 53123, at Denver, Colorado, in 1974.
- 68 more...