@book{30430,
	author = {Mehrens, William A. and Lehmann, Irvin J.},
	title = {Measurement and evaluation in education and psychology},
	publisher = {Holt, Rinehart and Winston},
	year = {c1973.},
	address = {New York},
	edition = {2d ed.},
	note = {Includes indexes.}
}