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  1. 81
    Published 1986
    Book
  2. 82
    by Vasta, Ross
    Published 1992
    Book
  3. 83
    by Piaget, Jean, 1896-1980
    Published 1970
    Book
  4. 84
    by Piaget, Jean, 1896-1980
    Published 1952
    Book
  5. 85
  6. 86
    by Piaget, Jean, 1896-1980
    Published 1930
    Book
  7. 87
    by Piaget, Jean, 1896-1980
    Published 1929
    Book
  8. 88
    by Piaget, Jean, 1896-1980
    Published 1969
    Book
  9. 89
    by Piaget, Jean, 1896-1980
    Published 1974
    Book
  10. 90
  11. 91
    by Piaget, Jean, 1896-1980
    Published 1955
    Book
  12. 92
    by Segal, Julius, 1924-
    Published 1979
    Book
  13. 93
    Published 1984
    Book
  14. 94
    by Goldman, Laurence
    Published 1998
    Book
  15. 95
    by Nadien, Margot B.
    Published 1980
    Book
  16. 96
    by Papalia, Diane E.
    Published 2004
    Book
  17. 97
    by Papalia, Diane E.
    Published 2006
    Book
  18. 98
  19. 99
    by Papalia, Diane E.
    Published 2002
    Book
  20. 100