Van Laer P Henry <br/><br/>
Philosophico-scientific problems tr by Henry J Koren 

 -  1953 
<br/><br/><label>Standard No.: </label>68,953 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>R3:A, J31