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
- 189 more...
- Itemimg5 - Great Northern Diesel Locomotive 83 at Seattle, Washington, 1970
- Itemimg50 - Great Northern Diesel Locomotive 370A at Spokane, Washington, 1970
- Itemimg51 - Great Northern Diesel Locomotive 370A at Great Falls, Montana, 1968
- Itemimg52 - Great Northern Diesel Locomotive 370C at Interbay, Washington, undated
- Itemimg53 - Great Northern Diesel Locomotive 400 at Denver, Colorado, 1972
- Itemimg54 - Great Northern Diesel Locomotive 401 at Denver, Colorado, 1971
- Itemimg57 - Great Northern Diesel Locomotive 414A/D at Denver, Colorado, 1959
- Itemimg6 - Great Northern Diesel Locomotive 83 at Seattle, Washington, 1970
- Itemimg65 - Great Northern Diesel Locomotive 448A at Vancouver, British Columbia, 1968
- 30 more...