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
- 47 more...
- Itemimg15 - Great Northern Diesel Locomotive 187 at Interbay, Washington, 1973
- Itemimg150 - Great Northern Diesel Locomotive 368C at Vancouver, British Columbia, 1962
- Itemimg151 - Great Northern Diesel Locomotive 408, 1967
- Itemimg152 - Great Northern Diesel Locomotive 410 at Saint Paul, Minnesota, 1968
- Itemimg153 - Great Northern Diesel Locomotive 418D at Minneapolis, Minnesota, 1964
- Itemimg154 - Great Northern Diesel Locomotive 423 at Minneapolis, Minnesota, 1968
- Itemimg155 - Great Northern Diesel Locomotive 436D at Clyde, Illinois, 1958
- Itemimg156 - Great Northern Diesel Locomotive 503 at Saint Paul, Minnesota, 1968
- Itemimg157 - Great Northern Diesel Locomotive 506 at Saint Paul, Minnesota, 1968
- 172 more...