@book{12427,
	author = {Powers, Edwin. and Witmer, Helen Leland},
	title = {An experiment in the prevention of delinquency: the Cambridge-Somerville Youth Study},
	publisher = {Patterson Smith},
	year = {1972.},
	series = {Patterson Smith reprint series in criminology, law enforcement, and social problems, publication no. 159},
	address = {Montclair, N.J.},
	note = {Reprint of the 1951 ed.}
}