Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series010 - Other Railroads
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3012 - Street railroads
- ItemWWAHP-001 - Seattle Municipal Railway Car 110, Burien, Washington, 1915
- ItemWWAHP-002 - Seattle Municipal Railway Employees, Seattle, Washington, 1914
- ItemWWAHP-003 - Seattle Municipal Railway Car, Seattle, Washington, 1925
- ItemWWAHP-004 - Seattle Municipal Railway Track, Seattle, Washington, 1915
- ItemWWAHP-005 - Seattle Municipal Railway Track, Seattle, Washington, 1915
- ItemWWAHP-006 - Seattle Municipal Railway Track, Seattle, Washington, 1915
- 2121 more...