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
- 17 more...
- ItemWerkema388 - A Northern Pacific sleeping car at North Bend, Washington, in 1966.
- ItemWerkema389 - Northern Pacific chair car 889 on the Puget Sound & Snoqualmie Valley Railroad as car 46 in North Bend, Washington, in 1986.
- ItemWerkema390 - Northern Pacific business car Green River at Vancouver, Washington, in 2001.
- ItemWerkema391 - Lake Whatcom Railway steam locomotive, Northern Pacific 1070 at Park, Washington, in 1977.
- ItemWerkema399 - Lake Whatcom Railway S-1 diesel locomotive 603 at Wickersham, Washington, in 2008.
- ItemWerkema400 - Lake Whatcom Railway passenger cars 603 and 634 at Wickersham, Washington, in 2008.
- ItemWerkema401 - Lake Whatcom Railway passenger cars 603 and 634 at Wickersham, Washington, in 2008.
- ItemWerkema402 - Lake Whatcom Railway passenger car 627 near Park, Washington, in 2008.