@book{39714,
	author = {Dansereau, Pierre MacKay and New York Botanical Garden.},
	title = {Challenge for survival},
	publisher = {Columbia University Press},
	year = {1970.},
	address = {New York},
	note = {Based on papers presented at a symposium held by the New York Botanical Garden, Apr. 25-26, 1968.}
}