@book{29448,
	author = {Griffiths, William,},
	title = {Behavior difficulties of children as perceived and judged by parents, teachers, and children themselves /},
	publisher = {Univ. of Minnesota Press,},
	year = {1952.},
	series = {University of Minnesota.  The Institute of Child Welfare.    Monograph series,},
	address = {Minneapolis :}
}