Verbatim text: Glass, C. and R. A. Foster. 1975. The genus Echinomastus in the Chihuahuan Desert. Cact. Succ. J. (Los Angeles) 47: 218–223.
Author: Glass, C., Foster, R.A.
Year: 1975
Title: The genus Echinomastus in the Chihuahuan Desert
Journal: Cact. Succ. J. (Los Angeles)
Volume: 47
Pages: 218–223