Scandura, Joseph M. Structural learning and concrete operations : an approach to Piagetian conservation / (by) Joseph M. Scandura (and) Alice B. Scandura. - New York : Praeger, 1980. - 204 p. : ill. ; 25 cm. Includes index. Bibliography: p.31-134. ISBN: 0030566975 Subjects--Personal Names: Piaget, Jean, 1896. Subjects--Topical Terms: Education--Philosophy.Conservation (Psychology).