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  1. 1
    by Piaget, Jean, 1896-
    Published 1976
    Book

    The child's conception of the world
  2. 2
    by Piaget, Jean, 1896-
    Published 1970
    Book

    The Child's conception of movement and speed = Les notions de mouvement et de vitesse chez l'enfant
  3. 3
    by Piaget, Jean 1896-
    Published 1967
    Book

    The Child's conception of the world
  4. 4
    by Piaget, Jean, 1896-
    Published 1952
    Book

    The Child's conception of number = Les Genese du numbre chez l'enfant
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