Logical thinking in children;

Additional authors: Hooper, Frank H., -- joint comp. | Piaget, Jean, -- 1896-1980. Published by : Holt, Rinehart and Winston (New York,) Physical details: xv, 541 p. illus. 24 cm. Subject(s): Piaget, Jean, -- 1896-1980. | Conservation of substance (Psychology) | Child psychology. Year: 1968

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