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
- 38 more...
- Itemimg141 - Great Northern Diesel Locomotive 273B at White Rock, British Columbia, 1961
- Itemimg142 - Great Northern Diesel Locomotive 276B at Vancouver, British Columbia, 1963
- Itemimg143 - Great Northern Diesel Locomotive 278A at Portland, Oregon, 1965
- 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
- 181 more...