@book{68259,
	author = {National Society for the Study of Education. and Henry, Nelson B.},
	title = {In-service education for teachers, supervisors, and administrators.},
	publisher = {NSSE; distributed by the University of Chicago Press},
	year = {1957.},
	series = {Yearbook of the National Society for the Study of Education, 56th, pt. 1},
	address = {Chicago}
}