Polya, George <br/><br/>
Patterns of plausible inference 
George Polya 
 - 2d ed. 
 - New Jersey  Princetton University Press  c1968 
 - x,225p.; 26cm.- 
 - Mathematics and plausible reasoning; no. 2 .
<br/><br/><label>Dewey Class. No.: </label>501  / POL