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
- 144 more...
- Itemimg383 - Great Northern Diesel Locomotive 620 at Hillyard, Washington, 1965
- Itemimg384 - Great Northern Diesel Locomotive 458D, 468C at Hillyard, Washington, 1965
- Itemimg385 - Great Northern Diesel Locomotive 458D, 468C at Hillyard, Washington, 1965
- Itemimg386 - Great Northern Diesel Locomotive 359C at Wenatchee, Washington, 1967
- Itemimg387 - Great Northern Diesel Locomotive 688 at Wenatchee, Washington, 1968
- Itemimg388 - Great Northern Diesel Locomotive 370A at Cashmere, Washington, 1969
- Itemimg389 - Great Northern Diesel Locomotive 370A at Leavenworth, Washington, 1964
- Itemimg39 - Great Northern Diesel Locomotive 359 at Spokane, Washington, undated
- Itemimg390 - Great Northern Diesel Locomotive 369A at Leavenworth, Washington, 1969
- 75 more...