Laer, Pierre Henri van. <br/><br/>
Philosophy of science. 

 - 2d ed. 
 - Pittsburgh  Duquesne University Press  1963- 
 - v.  26 cm. 
 - Duquesne studies. Philosophical series  6 .
<br/><br/>Bibliographical footnotes. 
<br/><br/>pt. 1. Science in general. 
<br/><br/><label>LCCN: </label>63011605  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Philosophy.
<br/><br/><label>LC Class. No.: </label>Q175  / .L19