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
- 122 more...
- Itemimg363 - Great Northern Diesel Locomotive 259A at Carlton, Minnesota, 1966
- Itemimg364 - Great Northern Diesel Locomotive 577 at Chisholm, Minnesota, 1970
- Itemimg365 - Great Northern Diesel Locomotive 2515 at Minneapolis, Minnesota, undated
- Itemimg366 - Great Northern Diesel Locomotive at Minneapolis, Minnesota, 1967
- Itemimg367 - Great Northern Diesel Locomotive 353A at Minneapolis, Minnesota, 1966
- Itemimg368 - Great Northern Diesel Locomotive 362A at Minnetonka, Minnesota, 1967
- Itemimg369 - Great Northern Diesel Locomotive 358A at Willmar, Minnesota, 1967
- Itemimg37 - Great Northern Diesel Locomotive 358B at Wenatchee, Washington, 1967
- Itemimg370 - Great Northern Diesel Locomotive 509 at Grand Forks, North Dakota, 1970
- 97 more...