Railroad Archives Online
- CollectionD0255 - Casey Adams Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3004 - Railroad Passenger Cars
- ItemCRAGNS314 - Great Northern Passenger Car 545, undated
- ItemCRAGNMISC017 - Great Northern Railroad Car 960 at Tacoma, Washington in 1950
- ItemCRAGNMISC026 - Great Northern Railroad Observation Car For the Cascadian, at Seattle, Washington in 1953