Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2005 - Landscape photography
- ItemJATGValley - Wide view of a mountain valley in Washington, undated.
- ItemJATGPassengerTrainSEA-VancouverBCSBellingham - Great Northern Railway passenger train in the vicinity of Bellingham, Washington, undated.