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  1. 1

    Practical research planning and design by Leedy, Paul D.

    Published 2013
    Book

    Practical research planning and design
  2. 2

    Practical research planning and design by Leedy, Paul D.

    Published 1997
    Book

    Practical research planning and design
  3. 3

    Practical research planning and design by Leedy, Paul D.

    Published 1993
    Book

    Practical research planning and design
  4. 4

    Practical research planning and design by Leedy, Paul D.

    Published 1989
    Book

    Practical research planning and design

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