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
- 154 more...
- ItemWerkema257 - Northern Pacific gondola car number 53123, at Denver, Colorado, in 1974.
- ItemWerkema258 - Northern Pacific gondola car number 56031, at Bellingham, Washington, in 2003.
- ItemWerkema259 - Northern Pacific gondola car number 58299, at Denver, Colorado, in 1974.
- ItemWerkema260 - Northern Pacific gondola car number 58352, at Broomfield, Colorado, in 1976.
- ItemWerkema261 - Northern Pacific gondola car number 58370, at Bellingham, Washington, in 1977.
- ItemWerkema262 - Northern Pacific gondola car number 58801, at Albuquerque, New Mexico, in 1979.
- ItemWerkema263 - Northern Pacific gondola car number 59440, at Denver, Colorado, in 1973.
- ItemWerkema264 - Northern Pacific gondola car number 59563, at Pasco, Washington, in 1981.
- ItemWerkema293 - Northern Pacific hopper car number 70374 at Denver, Colorado, in 1973.
- 60 more...