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  1. 1
    Published 1999
    Book

    The earth an ecology book for children in Asia and Pacific countries.
  2. 2
    by Ganeri, Anita
    Published 1995
    Book

    The sea is salty and other questions about the oceans
  3. 3
    by Tesar, Jenny Elizabeth
    Published 1992
    Book

    Endangered habitats.
  4. 4
    by Bonnet, Robert L.
    Published 1990
    Book

    Environmental science 49 science fair projects
  5. 5
    by Christine Back
    Published 1984
    Book

    The living earth.
  6. 6
    by Hoke, John
    Published 1971
    Book

    Ecology man's effect on his environment and its mechanisms
  7. 7
    by Adrian, Mary
    Published 1970
    Book

    A day and a night in the arctic
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