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  1. 71
    Published 1974
    Book

    How to do a science project
  2. 72
    Published 1974
    Book

    Elementary science ; learning by investigating 4 teacher's edition
  3. 73
    Published 1974
    Book

    Elementary science; learning by investigating 3 teacher's edition
  4. 74
    by Brewer, A. C.
    Published 1973
    Book

    Elementary school science; learning by investigating 5
  5. 75
    Published 1973
    Book

    New Unesco source book for science teaching.
  6. 76
    Published 1972
    Book

    Concepts in science; teacher's edition beginning level (Yellow) Paul F. Brandwein ...[et al.].
  7. 77
    Published 1972
    Book

    Concepts in science; teacher's edition level 1 (blue)
  8. 78
    Published 1972
    Book

    Concepts in science; teacher's edition level 2 (Red)
  9. 79
    Published 1972
    Book

    Conepts in science; teacher's edition Level 3 (Green)
  10. 80
    Published 1972
    Book

    Concepts in science ; teacher's edition level 4 (Orange)
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