Cohen, Morris R; Nagel, Ernest <br/><br/>
Introduction to logic and scientific method 

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 - Harcourt Brace & World, New York  1934 
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<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research methodology
<br/><br/><label>Dewey Class. No.: </label>001.42  COH-I