1.
図書 |
Barry J. Wadsworth ; with drawings by the author
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2.
図書 |
Robbie Case
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3.
図書 |
Herbert J. Klausmeier and associates
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4.
図書 |
edited by Pierre R. Dasen ; preface by Jean Piaget
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5.
図書 |
editors, Bärbel Inhelder and Harold H. Chipman ; Charles Zwingmann, coordinating editor ; with contributions by members of the faculty of the Faculté de psychologie et des sciences de l'éducation, University of Geneva, Jean Piaget ... [et al.]
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