Railroad Archives Online
- CollectionE0316 - Robert W. Downing Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3002 - Depots/Freighthouses
- ItemJSRH60852 - Model of Great Northern Depot in Spokane, Washington