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
- 7 more...
- Itemimg233 - Great Northern Snow Plow X1510 at Interbay, Washington, 1973
- Itemimg234 - Great Northern Snow Plow X1510 at Interbay, Washington, 1973
- Itemimg235 - Great Northern Snow Plow X1510 at Interbay, Washington, 1973
- Itemimg236 - Great Northern Crane X1740 at Interbay, Washington, undated
- 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
- 36 more...