Railroad Archives Online
- CollectionD0237A - Great Northern Railway Historical Society Cascade Division Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1013 - Operations documents
- Subseries Level 2005 - Railroad Accident Reports
- ItemGNRHSCD324 - Interstate Commerce Commission Report on a Fatal Accident at the Foss River Bridge, Tonga, Washington on March 7, 1945