Cognitive development of children and youth : a longitudinal study / Herbert J. Klausmeier, Patricia S. Allen. Klausmeier, Herbert J. (Herbert John) 1915-2014. Allen, Patricia S. joint author. Cognition in children. Cognition in children Research. BF723.C5 K57 155.413 KLC Includes indexes. Includes bibliographical references and index. New York : Academic Press, 1978. 1978. 1978 Text xii, 327 p. : eng Educational psychology ;