Railroad Archives Online
- CollectionD0036 - George Werkema Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3004 - Railroad Passenger Cars
- Itemimg1216 - Great Northern Heater Car 19 at Wickersham, Washington, 2008
- Itemimg277 - Great Northern Passenger Car at Cashmere, Washington, 1987
- Itemimg278 - Great Northern Passenger Car at Cashmere, Washington, 1987
- Itemimg279 - Great Northern Passenger Car at Cashmere, Washington, 1987
- Itemimg280 - Great Northern Passenger Car at Cashmere, Washington, 1987
- 38 more...