Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series001 - Burlington Northern Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3006 - Cabooses (Railroads)
- ItemWWASPSL3-082 - Burlington Northern (BN) Caboose at Vancouver, Washington, December 1970
- ItemWWASPSL3-086 - Burlington Northern (BN) Caboose at Vancouver, Washington, December 1970
- ItemWWASPSL3-081 - Burlington Northern (BN) Caboose at Vancouver, Washington, December 1970