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
- 61 more...
- ItemWerkema164 - Northern Pacific box car 24367 at Pasco, Washington, in 1981.
- ItemWerkema165 - Northern Pacific box car 24429 at Albuquerque, New Mexico, in 1981.
- ItemWerkema166 - Northern Pacific box car 24807 at Pasco, Washington, in 1981.
- ItemWerkema167 - Northern Pacific box car 27316 at Denver, Colorado, in 1982.
- ItemWerkema168 - Northern Pacific box car 26969 at Longmont, Colorado, in 1978.
- ItemWerkema169 - Northern Pacific box car 26969 at Longmont, Colorado, in 1978.
- ItemWerkema170 - Northern Pacific box car 28014 at Denver, Colorado, in 1970.
- ItemWerkema171 - Northern Pacific box car 28014 at Denver, Colorado, in 1970.
- ItemWerkema172 - Burlington Northern box car 950289 at the Northwest Railway Museum in Snoqualmie, Washington, in 2005.
- 153 more...