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 3010 - Miscellaneous
- 14 more...
- ItemWWASPSL9-082 - Willamette River, Oregon, undated
- ItemWWASPSL1-001 - Riverfront at Portland, Oregon, undated
- ItemWWASPSL1-002 - Riverfront at Portland, Oregon, undated
- ItemWWASPSL1-003 - Riverfront at Portland, Oregon, undated
- ItemWWASPSL1-004 - Grain Terminal Number 4 at Portland, Oregon, undated