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
- 73 more...
- Itemimg19 - Great Northern Diesel Locomotive 259A at Superior, Wisconsin, 1966
- Itemimg2 - Great Northern Diesel Locomotive 14 at Vancouver, British Columbia, 1968
- Itemimg20 - Great Northern Diesel Locomotive 259A at Superior, Wisconsin, 1966
- Itemimg21 - Great Northern Diesel Locomotive 263A at Tacoma, Washington, 1966
- Itemimg22 - Great Northern Diesel Locomotive 263B at Vancouver, British Columbia, 1961
- Itemimg23 - Great Northern Diesel Locomotive 274B at Interbay, Washington, 1973
- Itemimg24 - Great Northern Diesel Locomotive 275B at Minneapolis, Minnesota, 1970
- Itemimg25 - Great Northern Diesel Locomotive 275B at Minneapolis, Minnesota, 1970
- Itemimg26 - Great Northern Diesel Locomotive 276 at Hillyard, Washington, undated
- 146 more...