Verbatim text: Heil, K. D., B. Armstrong, and D. Schleser. 1981. A review of the genus Pediocactus. Cact. Succ. J. (Los Angeles) 53: 17–39.
Author: Heil, K.D., Armstrong, B., Schleser, D.
Year: 1981
Title: A review of the genus Pediocactus
Journal: Cact. Succ. J. (Los Angeles)
Volume: 53
Pages: 17–39