@book{20427,
	author = {National Society for the Study of Education. and Stevenson, Harold W.},
	title = {Child psychology},
	publisher = {NSSE; distributed by the University of Chicago Press},
	year = {1963.},
	series = {Yearbook of the National Society for the Study of Education. [new ser.] 62d, pt. 1},
	address = {Chicago}
}