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  1. 381
    by Piaget, Jean 1896-
    Published 1930
    Book

    The child's conception of physical causality
  2. 382
    by Piaget, Jean 1896-
    Published 1928
    Book

    Judgment and reasoning in the child
  3. 383
    by Lehman, Harvey C.
    Published 1927
    Book

    The psychology of play activities
  4. 384
    Book

    The mental growth of the pre-school child a psychological outline of normal development from birth to the sixth year, including a system of developmental diagnosis
  5. 385
    Book

    The first two decades of life
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