Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series009 - Logging Railroads
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3001 - Steam Locomotives
- ItemWWASPSL6-026 - Klickitat Log & Lumber Company Steam Locomotive 5 at Klickitat, Washington, June 1958
- ItemWWASPSL6-027 - Klickitat Log & Lumber Company Steam Locomotive 7 at Klickitat, Washington, undated
- ItemWWASPSL6-028 - Klickitat Log & Lumber Company Steam Locomotive 7 at Klickitat, Washington, September 22, 1959
- ItemWWASPSL6-029 - Klickitat Log & Lumber Company Steam Locomotive 7 at Klickitat, Washington, September 21, 1959