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 3005 - Maintenance of Way cars
- 11 more...
- Itemimg237 - Great Northern Maintenance of Way Flatcar X1910, undated
- Itemimg238 - Great Northern Maintenance of Way Tool Car X2770 at Bellingham, Washington, 1969
- Itemimg239 - Great Northern Sand Car X2975 at Pasco, Washington, 1983
- Itemimg240 - Great Northern Sand Car X2975 at Pasco, Washington, 1984
- Itemimg241 - Great Northern Sand Car X2990 at Interbay, Washington, 1973
- Itemimg242 - Great Northern Maintenance of Way Steel Erection Crew Car O3058 at Tacoma, Washington, 1982
- Itemimg243 - Great Northern Maintenance of Way ex-Baggage Car O3111, undated
- Itemimg244 - Great Northern Maintenance of Way ex-Passenger Car O3192, undated
- Itemimg245 - Great Northern Maintenance of Way Tool Car O3201 at Bellingham, Washington, 1968
- 32 more...