@book{9264,
	author = {Levis, Donald J.,},
	title = {Learning approaches to therapeutic behavior change.},
	publisher = {Aldine Pub. Co.},
	year = {[1970]},
	address = {Chicago,},
	note = {Proceedings of the 5th of a series of meetings; proceedings of the 4th are entered under the title: Contributions to clinical neuropsychology; the 6th under the title: The Experimental psychology of mental retardation.}
}