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
- 24 more...
- Itemimg129 - Great Northern Diesel Locomotive 100 at Minneapolis, Minnesota, 1968
- Itemimg13 - Great Northern Diesel Locomotive 181 at Whitefish, Montana, 1996
- Itemimg130 - Great Northern Diesel Locomotive 101 at Minneapolis, Minnesota, 1968
- Itemimg131 - Great Northern Diesel Locomotive 114 at Minneapolis, Minnesota, 1966
- Itemimg132 - Great Northern Diesel Locomotive 140 at Minneapolis, Minnesota, 1964
- Itemimg133 - Great Northern Diesel Locomotive 180 at Superior, Wisconsin, 1958
- Itemimg134 - Great Northern Diesel Locomotive 190 at Minneapolis, Minnesota, 1968
- Itemimg135 - Great Northern Diesel Locomotive 206 at Minneapolis, Minnesota, 1968
- Itemimg136 - Great Northern Diesel Locomotive 222 at Interbay, Washington, 1963
- 195 more...