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
- 82 more...
- Itemimg27 - Great Northern Diesel Locomotive 277A at Vancouver, British Columbia, 1963
- Itemimg28 - Great Northern Diesel Locomotive 277B at Interbay, Washington, 1964
- Itemimg29 - Great Northern Diesel Locomotive 278A at Spokane, Washington, 1967
- Itemimg3 - Great Northern Diesel Locomotive 80 at Minneapolis, Minnesota, 1968
- 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
- 137 more...