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 3002 - Diesel Locomotives
- 101 more...
- Itemimg343 - Great Northern Diesel Locomotive 227 at South Bellingham, Washington, 1965
- Itemimg344 - Great Northern Diesel Locomotive 320 at Bellingham, Washington, 1966
- Itemimg345 - Great Northern Diesel Locomotive 320 at Bellingham, Washington, 1966
- Itemimg346 - Great Northern Diesel Locomotive at South Bellingham, Washington, 1966
- Itemimg347 - Great Northern Diesel Locomotive at South Bellingham, Washington, 1966
- Itemimg348 - Great Northern Diesel Locomotive 274A at South Bellingham, Washington, 1966
- Itemimg349 - Great Northern Diesel Locomotive 274A/B at South Bellingham, Washington, 1966
- Itemimg35 - Great Northern Diesel Locomotive 355A at Wenatchee, Washington, 1967
- Itemimg350 - Great Northern Diesel Locomotive at South Bellingham, Washington, 1966
- 118 more...