Beard, Ruth Mary. An outline of Piaget's developmental psychology for students and teachers, by Ruth M. Beard. - London, Routledge & K. Paul, 1969. - xi, 128 p. illus. 19 cm. - The Students library of education . Bibliography: p. 123-128. ISBN: 0710063407 Nat. Bib. No.: B69-06587 Subjects--Personal Names: Piaget, Jean, 1896-1980. Subjects--Topical Terms: Child psychology. Dewey Class. No.: 155.4