@book{79036,
	author = {Olson, David R.},
	title = {Media and symbols :},
	publisher = {National Society for the Study of Education : distributed by the University of Chicago Press,},
	year = {1974.},
	series = {Yearbook of the National Society for the Study of Education ; new ser., 73d, pt. 1},
	address = {Chicago :}
}