@book{4324,
	author = {Wittich, Walter Arno, and Schuller, Charles Francis,},
	title = {Instructional technology :},
	publisher = {Harper & Row,},
	year = {1973.},
	series = {Exploration series in education},
	address = {New York :},
	edition = {5th ed.},
	note = {First-4th ed. published under title: Audiovisual materials.}
}