A phytogeographic and taxonomic study of the southern California trees and shrubs.
Abrams, Le Roy,
Horticultural Society of New York gift, June 2006.
K. K. Mackenzie collection.
Issued also as thesis (Ph.D.)--Columbia university, 1910.
"Reprinted from the Bulletin of the New York Botanical Garden. vol. VI, no. 21. Issued in advance, September, 1910."