Barrio, Raymond. The Plum Plum Pickers. California: Ventura Press, 1977

Barrio, Raymond. The Plum Plum Pickers. California: Ventura Press, 1977, Box: 5, Volume: 45. Midwest Distributors records, RH MS 949. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/574180 Accessed March 06, 2026.