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 3004 - Railroad Passenger Cars
- 9 more...
- ItemWerkema380 - Northern Pacific Dinning car 451 at Richland, Washington, in 1981.
- ItemWerkema381 - Northern Pacific coach car 634 at Wickersham, Washington, in 1973.
- ItemWerkema382 - Northern Pacific coach 1361 at Snoqualmie, Washington, in 2005.
- ItemWerkema383 - Northern Pacific coach 1361 at Snoqualmie, Washington, in 2005.
- ItemWerkema384 - Northern Pacific dinning car 1663 at Easton, Washington, in 1987.
- ItemWerkema385 - Northern Pacific coach-snack bar 1681 at Wickersham, Washington, in 1993.
- ItemWerkema386 - Northern Pacific coach-snack bar 1681 at Wickersham, Washington, in 1993.
- ItemWerkema387 - Northern Pacific coach-snack bar 1681 at Park, Washington, in 1977.
- ItemWerkema388 - A Northern Pacific sleeping car at North Bend, Washington, in 1966.
- 7 more...