@book{924,
	author = {Hallas, Charles H.},
	title = {The care and training of the mentally subnormal,},
	publisher = {Williams and Wilkins,},
	year = {1970.},
	address = {Baltimore,},
	edition = {4th ed.},
	note = {First ed. published in 1958 under title: The nursing of mental defectives. Second ed. published in 1962 under title: Nursing the mentally subnormal. Fifth ed. published in 1974 under title: The care and training of the mentally handicapped.}
}