@book{15405,
	author = {Grossnickle,Foster E. and Reckzeh,John},
	title = {Discovering meanings in elementary school mathematics/},
	publisher = {Holt,Rinehart and Winston, Inc.},
	year = {c1973},
	address = {New York :},
	edition = {6th ed.},
	note = {Includes index.}
}