Place of Publication
Some results of twenty years of cactus research PartII. Cactus and Succulent Journal (Los Angeles) 23(3): 81-88: 88 (1951a)
References
-
Backeberg (1951a)
Backeberg, C. 1951a. Some results of twenty years of cactus research PartII. Cactus and Succulent Journal (Los Angeles), 23(3): 81-88