1.
図書 |
by Bärbel Inhelder, Hermine Sinclair, and Magali Bovet ; translated by Susan Wedgwood
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2.
図書 |
by Bärbel Inhelder, Hermine Sinclair, and Magali Bovet ; translated by Susan Wedgwood
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3.
図書 |
par Jean Piaget et Bärbel Inhelder ; avec la collaboration de M. Bovet ... [et al.]
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4.
図書 |
Jean Piaget and Bärbel Inhelder ; in collaboration with M. Bovet ... [et al.] ; translated from the French by P.A. Chilton
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