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    Positivism in the United States.H. A. L. & Richmond Laurin Hawkins - 1938 - Journal of Philosophy 35 (24):665.
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    Positivism in the United States (1853-1861).Richmond Laurin Hawkins - 1938 - Cambridge: Harvard University Press.
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  3. Positivism in the United States.Richmond Laurin Hawkins - 1940 - Philosophical Review 49:488.
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