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
- 141 more...
- ItemWerkema244 - Northern Pacific flat car 62853 at Denver, Colorado, in 1982.
- ItemWerkema245 - Northern Pacific flat car 62873 at St. Joseph, Missouri, in 1982.
- ItemWerkema246 - Northern Pacific flat car 62783 at Pasco, Washington, in 1971.
- ItemWerkema247 - Northern Pacific flat car 65001 at Denver, Colorado, in 1973.
- ItemWerkema248 - Northern Pacific flat car 66118 at Albuquerque, New Mexico, in 1978.
- 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.
- 73 more...