Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series010 - Other Railroads
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3006 - Cabooses (Railroads)
- ItemWWAPCN0220 - Pacific Coast Railway wood caboose number 2 in California, circa 1928.
- ItemWWAPCN0221 - Pacific Coast Railway wood caboose number 3 at San Luis Obispo, California in June 1946.