Ritchie, Arthur David, 1891-1967.  Ritchie, Arthur David, 1891-1967. <br/><br/>
Scientific method :  an inquiry into the character and validity of natural laws. 

 - Paterson, NJ :  Littlefield, Adams,  1960. 
 - International library of psychology, philosophy and scientific method .
<br/><br/> "First published 1923." 
<br/><br/><label>LCCN: </label>60015120 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science -- Methodology.--Science -- Methodology.
<br/><br/><label>LC Class. No.: </label>Q175  / .R5 1960 
<br/><br/><label>Dewey Class. No.: </label>501.8