Polya, George., [et al]. <br/><br/>
Applied combinatorial mathematics   
by George Polya 
 - New York  John Wiley & Sons  1964 
 - xxi, 608p., incl ind. 
 - Engineering and Physical Science Extension Series .
<br/><br/><label>LCCN: </label>64-23826 
<br/><br/><label>Dewey Class. No.: </label>511.6  / N64