Lovell, K.
The growth of basic mathematical and scientific concepts in children, by K. Lovell; foreword by Bärbel Inhelder. - 5th ed., 2nd impression. - London, University of London P., 1968. - 158 p. illus. 22 cm. - Unibooks .
Includes bibliographies.
0340087994
72369405
B68-14837
Number concept in children.
Conservation (Psychology)
BF723.N8 / .L68 1968
The growth of basic mathematical and scientific concepts in children, by K. Lovell; foreword by Bärbel Inhelder. - 5th ed., 2nd impression. - London, University of London P., 1968. - 158 p. illus. 22 cm. - Unibooks .
Includes bibliographies.
0340087994
72369405
B68-14837
Number concept in children.
Conservation (Psychology)
BF723.N8 / .L68 1968