Showing 1 - 3 results of 3 for search 'Purtill, Richard L. 1931-', query time: 0.01s Refine Results
  1. 1

    Logic argument, refutation, and proof by Purtill, Richard L. 1931-

    Published 1979
    Book

    Logic argument, refutation, and proof
  2. 2

    Thinking about ethics by Purtill, Richard L. 1931-

    Published 1976
    Book

    Thinking about ethics
  3. 3

    Logical thinking by Purtill, Richard L. 1931-

    Published 1972
    Book

    Logical thinking

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