Railroad Archives Online
- CollectionD0036 - George Werkema Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3003 - Maintenance Facilities
- 8 more...
- Itemimg1140 - Great Northern Diesel Locomotive Shop at Great Falls, Montana, 1990
- Itemimg1141 - Great Northern Diesel Locomotive Shop at Great Falls, Montana, 1990
- Itemimg1142 - Great Northern Turntable at Great Falls, Montana, 1990
- Itemimg191 - Great Northern Roundhouse at Saint Paul, Minnesota, 1964
- Itemimg192 - Great Northern Roundhouse at Saint Paul, Minnesota, 1968