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
- 155 more...
- ItemWWAGD-52-160 - Great Northern Diesel Locomotive 307A, undated
- ItemWWAGD-52-161 - Great Northern Diesel Locomotive 307A at Minneapolis, Minnesota, 1969
- ItemWWAGD-52-162 - Great Northern Diesel Locomotive 307A, undated
- ItemWWAGD-52-163 - Great Northern Diesel Locomotive 307C at Minneapolis, Minnesota, 1970
- ItemWWAGD-52-165 - Great Northern Diesel Locomotive 308A at Minneapolis, Minnesota, undated
- ItemWWAGD-52-166 - Great Northern Diesel Locomotive 309A at Minneapolis, Minnesota, 1969
- ItemWWAGD-52-167 - Great Northern Diesel Locomotive 308C, undated
- ItemWWAGD-52-169 - Great Northern Diesel Locomotive 309A at Superior, Wisconsin, 1966
- ItemWWAGD-52-171 - Great Northern Diesel Locomotive 309C, undated
- 253 more...