Polya, G. <br/><br/>
How to solve it :  a new aspect of mathematical method  

 - London  Princeton University Press  2014 
 - 253p. 
 - Princeton science library .
<br/><br/><label>ISBN: </label>9780691164076 
<br/><br/><label>Dewey Class. No.: </label>510.76  / POY/H