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
- 5 more...
- Itemimg109 - Great Northern Diesel Locomotive 2513 at Denver, Colorado, 1970
- Itemimg11 - Great Northern Diesel Locomotive 136 at Hillyard, Washington, 1965
- Itemimg111 - Great Northern Diesel Locomotive 3000 at Minneapolis, Minnesota, 1964
- Itemimg112 - Great Northern Diesel Locomotive 3004 at Spokane, Washington, 1970
- Itemimg113 - Great Northern Diesel Locomotive 3004 at Minneapolis, Minnesota, 1969
- Itemimg116 - Great Northern Diesel Locomotive 3006 at Galesburg, Illinois, 1971
- Itemimg117 - Great Northern Diesel Locomotive 3010 at Denver, Colorado, 1970
- Itemimg118 - Great Northern Diesel Locomotive 3021 at Whitefish, Montana, 1969
- Itemimg119 - Great Northern Diesel Locomotive 3021 at Havre, Montana, 1969
- 214 more...