Ralph W. Lewis

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Theory of Descent with Modification

Ralph W. Lewis, 1995 .

How to write laboratory studies which will teach the scientific method

Ralph W. Lewis, 1947 .

User's Reaction to Microfiche-A Preliminary Study

Ralph W. Lewis, 1970 .

An analysis of a laboratory study designed to teach the scientific method

Ralph W. Lewis, 1947 .

Biology: A Hypothetico-Deductive Science.

Ralph W. Lewis, R. W. Lewis, 1988 .

Science and Creativity

Ralph W. Lewis, 1982 .

Evolution: A System Of Theories

Ralph W. Lewis, R. W. Lewis, 2015 .