Railroad Archives Online
- CollectionD0153 - Doug Wingfield Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3002 - Diesel Locomotives
- 20 more...
- ItemWingfield.82 - Great Northern Diesel Locomotive 180 at Spokane, Washington, 1968
- ItemWingfield.83 - Great Northern Diesel Locomotive 180 at Spokane, Washington, 1968
- ItemWingfield.84 - Great Northern Diesel Locomotive 180 at Spokane, Washington, 1968
- ItemWingfield.86 - Great Northern Diesel Locomotive 562 at Superior, Wisconsin, 1961
- ItemWingfield.87 - Great Northern Diesel Locomotive 562 at Superior, Wisconsin, 1961
- ItemWingfield.89 - Great Northern Diesel Locomotive 568 at Spokane, Washington, 1968
- ItemWingfield.90 - Great Northern Diesel Locomotive 568 at Spokane, Washington, 1968
- ItemWingfield.91 - Great Northern Diesel Locomotive 569 at Spokane, Washington, 1968
- ItemWingfield.94 - Great Northern Diesel Locomotive 325 at Sandpoint, Idaho, 1968
- 10 more...