Railroad Archives Online
- CollectionE0479 - Great Northern Railway Public Relations Photos
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2005 - Landscape photography
- ItemPR.FRT.02 - Great Northern Diesel Locomotive at Appleyard, Washington, undated
- ItemPR.FRT.04 - Great Northern Diesel Locomotives, undated