@book{5829,
	author = {World Health Organization.},
	title = {Mental retardation : meeting the challenge.},
	publisher = {World Health Organization,},
	year = {1985.},
	series = {(WHO offset publication ; no. 86).},
	address = {Geneva : },
	note = {Prepared in collaboration with the Joint Commission on International Aspects of Mental Retardation.}
}