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  1. 11
    by Jacobson, Willard J.
    Published 1965
    Book

    Thinking ahead in science learning in science
  2. 12
    by Jacobson, Willard J.
    Published 1964
    Book

    Broadening worlds of science
  3. 13
    by Jacobson, Willard J.
    Published 1964
    Book

    Challenges in science
  4. 14
    by Jacobson, Willard J.
    Published 1964
    Book

    Adventures in science
  5. 15
    by Jacobson, Willard J.
    Published 1964
    Book

    Broadening worlds of science
  6. 16
    by Jacobson, Willard J.
    Published 1964
    Book

    Challenges in science
  7. 17
    Published 1964
    Book

    Adventures in science
  8. 18
    by Jacobson, Willard J.
    Published 1961
    Book

    Modern elementary school science a recommended squence
  9. 19
    by Jacobson, Willard J.
    Published 1961
    Book

    Modern elementary school science: a recommended sequence
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