Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3002 - Diesel Locomotives
- 132 more...
- ItemWWAGD-52-134 - Great Northern Diesel Locomotive 273A, undated
- ItemWWAGD-52-135 - Great Northern Diesel Locomotive 277B at Seattle, Washington, undated
- ItemWWAGD-52-136 - Great Northern Diesel Locomotive 274B, 1970
- ItemWWAGD-52-137 - Great Northern Diesel Locomotive 273A at Vancouver, Washington, 1970
- ItemWWAGD-52-138 - Great Northern Diesel Locomotive 316C at Superior, Wisconsin, 1969
- ItemWWAGD-52-140 - Great Northern Diesel Locomotive 271B, 1970
- ItemWWAGD-52-141 - Great Northern Diesel Locomotive 271A, 1970
- ItemWWAGD-52-142 - Great Northern Diesel Locomotive 273B at White Rock, British Columbia, undated
- ItemWWAGD-52-143 - Great Northern Diesel Locomotive 274A, 1968
- 268 more...