Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series007 - Spokane, Portland, and Seattle Railway
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3008 - Buses
- ItemWWASPSB1-001 - Spokane, Portland and Seattle Transportation Company (SP&ST) Municipal Stage Terminal, Portland, Oregon, undated
- ItemWWASPSB1-002 - Spokane, Portland and Seattle Transportation Company (SP&ST) Municipal Stage Terminal Confectionery, Portland, Oregon, undated
- ItemWWASPSB1-003 - Spokane, Portland and Seattle Transportation Company (SP&ST) Municipal Stage Terminal Lunch Room, Portland, Oregon, undated
- ItemWWASPSB1-004 - Spokane, Portland and Seattle Transportation Company (SP&ST) White Motor Company Stage Number One, Portland, Oregon, undated
- ItemWWASPSB1-005 - Spokane, Portland and Seattle Transportation Company (SP&ST) Stage on Road to Rainier Oregon, undated
- 30 more...