Laer, Henry van <br/><br/>
Philosophico-Scientific problems 

 - Pittsburgh :  Ducesne University press,  1953 
 - xii, 168p.;  25 cm. 
 - Duquesne Studies. Philosophical series;  3 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Filosofía<br/>Ciencia
<br/><br/><label>Universal Decimal Class. No.: </label>5:1