Benson, L. D. 1969: The cacti of the United States and Canada. New names and nomenclatural combinations. – Cactus and Succulent Journal 41(4): 185–190

Title	The cacti of the United States and Canada. New names and nomenclatural combinations
Authorship	Benson, L. D.
Date published	1969
Volume	41(4)
In journal	Cactus and Succulent Journal
Pages	185–190