@book{50319,
	author = {Levinson, Abraham, and McDougall, Kay. and Julian D. Levinson Research Foundation, Chicago.},
	title = {The mentally retarded child :},
	publisher = {Allen & Unwin,},
	year = {1955},
	address = {London :},
	note = {"Prepared under the auspices of the Dr. Julian D. Levinson Research Foundation."}
}