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
- 41 more...
- Itemimg144 - Great Northern Diesel Locomotive 324 at Saint Paul, Minnesota, 1967
- Itemimg145 - Great Northern Diesel Locomotive 326 at Saint Paul, Minnesota, 1966
- Itemimg146 - Great Northern Diesel Locomotive 328 at Saint Paul, Minnesota, 1968
- Itemimg147 - Great Northern Diesel Locomotive 352C at Vancouver, British Columbia, 1961
- Itemimg148 - Great Northern Diesel Locomotive 353C at Kelso, Washington, 1961
- Itemimg149 - Great Northern Diesel Locomotive 367A at Minnetonka, Minnesota, 1968
- 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
- 178 more...