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
- 31 more...
- Itemimg257 - Great Northern Maintenance of Way Flatcar O3601 at Skykomish, Washington, 1987
- Itemimg258 - Great Northern Maintenance of Way Tool Car O3644 at Bellingham, Washington, 1974
- Itemimg259 - Great Northern Maintenance of Way Tool Car O3685, undated
- Itemimg260 - Great Northern Maintenance of Way Flatcar X5160 at Bellingham, Washington, 1974
- Itemimg261 - Great Northern Maintenance of Way Tool Car X5180, undated
- Itemimg262 - Great Northern Maintenance of Way ex-Boxcar X5372 at Cle Elum, Washington, 1999
- Itemimg263 - Great Northern Maintenance of Way ex-Boxcar X5372 at Cle Elum, Washington, 1969
- Itemimg264 - Great Northern Maintenance of Way ex-Boxcar X5372 at Cle Elum, Washington, 1999
- Itemimg265 - Great Northern Maintenance of Way Tool Car O6001 at Bellingham, Washington, 1969
- 12 more...