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
- 196 more...
- Itemimg6 - Great Northern Diesel Locomotive 83 at Seattle, Washington, 1970
- Itemimg65 - Great Northern Diesel Locomotive 448A at Vancouver, British Columbia, 1968
- Itemimg66 - Great Northern Diesel Locomotive 454A at Interbay, Washington, 1971
- Itemimg69 - Great Northern Diesel Locomotive 466A at Cashmere, Washington, 1970
- Itemimg7 - Great Northern Diesel Locomotive 83 at Interbay, Washington, 1970
- Itemimg70 - Great Northern Diesel Locomotive 466A at Spokane, Washington, 1967
- Itemimg71 - Great Northern Diesel Locomotive 466B at Spokane, Washington, 1968
- Itemimg72 - Great Northern Diesel Locomotive 508, undated
- Itemimg73 - Great Northern Diesel Locomotive 509 at Superior, Wisconsin, 1968
- 23 more...