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 3001 - Steam Locomotives
- 6 more...
- Itemimg186 - Great Northern Steam Locomotive 1147 at Wenatchee, Washington, 1988
- Itemimg187 - Great Northern Steam Locomotive 1147 at Wenatchee, Washington, 1987
- Itemimg188 - Great Northern Steam Locomotive 1147 at Wenatchee, Washington, 1999
- Itemimg189 - Great Northern Steam Locomotive 3224, 1960
- Itemimg190 - Great Northern Steam Locomotive 2584 at Havre, Montana, 2007