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
- 86 more...
- Itemimg30 - Great Northern Diesel Locomotive 279A at Wenatchee, Washington, 1967
- Itemimg31 - Great Northern Diesel Locomotive 279A at Appleyard, Washington, undated
- Itemimg33 - Great Northern Diesel Locomotive 354C at Seattle, Washington, 1962
- Itemimg332 - Great Northern Diesel Locomotive 323 at Bellingham, Washington, 1968
- Itemimg333 - Great Northern Diesel Locomotive 323 at New Westminster, British Columbia, 1968
- Itemimg334 - Great Northern Diesel Locomotive 323 at New Westminster, British Columbia, 1968
- Itemimg335 - Great Northern Diesel Locomotive 323 at New Westminster, British Columbia, 1968
- Itemimg336 - Great Northern Diesel Locomotive at Blaine, Washington, 1968
- Itemimg337 - Great Northern Diesel Locomotive 370C at Bellingham, Washington, 1968
- 133 more...