Mussen, Paul Henry. Trends and issues in developmental psychology/ edited by Paul H. Mussen, Jonas Langer and Martin Covington. - New York : Rinehart and Winston, 1969. - xi, 212 p. : ill. ; 24 cm. Includes bibliographical references. Subjects--Topical Terms: Child study--Addresses, essays, lectures. Dewey Class. No.: 155.4 MUS