Railroad Archives Online
- CollectionD0011 - James M. Fredrickson Collection
- Series001 - Burlington Northern Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3006 - Cabooses (Railroads)
- ItemJMF08-05462.0 - Burlington Northern steel caboose number 11399, circa 1978.
- ItemJMF17-12852.0 - Burlington Northern caboose 11473 at Longview, Washington in 1981.
- ItemJMF17-12854.0 - Burlington Northern caboose 10138 at Tacoma, Washington in 1972.
- ItemJMF17-12858.0 - Burlington Northern caboose 11708 at Oklahoma City, Oklahoma in 1982.
- ItemJMF17-12346.0 - Burlington Northern caboose on train 112 at Tacoma, Washington in 1986.
- ItemJMF17-12853.0 - Burlington Northern caboose 10418 circa 1975.