@book{78071,
	author = {McKown, Harry C. and Roberts, Alvin B.,},
	title = {Audio-visual aids to instruction / },
	publisher = {McGraw-Hill book company, inc.,},
	year = {1940.},
	series = {McGraw-Hill series in education, Harold Benjamin, consulting editor.},
	address = {New York : },
	edition = {1st ed.},
	note = {"Selected references" at end of each chapter except chapter III. "Sources of materials and equipment": p. 365-375.}
}