Showing 11 - 20 results of 20 for search 'Walch', query time: 0.01s Refine Results
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    Simple experiments in biology for home and school by Boyd, Helen Warner

    Published 1959
    Book
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    A laboratory manual for high school biology by Knepp, Thomas H.

    Published 1958
    Book
  7. 17

    Successful devices in teaching biology by Boyd, Helen Warner

    Published 1957
    Book
  8. 18

    Dramatizations from science by Cordell, Cristobel Morley

    Published 1957
    Book
  9. 19

    Modern therapeutics, 1937-1938.

    Published 1938
    Book
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