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Lovell, K.

The growth of basic mathematical and scientific concepts in children / by K. Lovell ; foreword by Barbel Inhelder. - 5th ed. - London: University of London Press, 1972. - 158 p. ; 21 cm.

Includes bibliographical refences and index.

ISBN: 0340083816

Subjects--Topical Terms:
Conservation (Psychology)
Number concept in children

Dewey Class. No.: 155.413