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  1. 1

    The principles of scientific research by Freedman, Paul

    Published 1960
    Book

    The principles of scientific research
  2. 2

    The principles of scientific research by Freedman, Paul

    Published 1960
    Book

    The principles of scientific research
  3. 3

    The principles of scientific research. by Freedman, Paul

    Published 1950
    Book

    The principles of scientific research.
  4. 4

    The principles of scientific research by Freedman, Paul

    Published 1949
    Book

    The principles of scientific research

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