Railroad Archives Online
- FondsD0063 - Walter W. Ainsworth Collection
- Cyfres010 - Other Railroads
- Is-gyfres014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 012 - Street railroads
- EitemWWAHP-001 - Seattle Municipal Railway Car 110, Burien, Washington, 1915
- EitemWWAHP-002 - Seattle Municipal Railway Employees, Seattle, Washington, 1914
- EitemWWAHP-003 - Seattle Municipal Railway Car, Seattle, Washington, 1925
- EitemWWAHP-004 - Seattle Municipal Railway Track, Seattle, Washington, 1915
- EitemWWAHP-005 - Seattle Municipal Railway Track, Seattle, Washington, 1915
- 2122 mwy...