Polya, George,    1887-1985. <br/><br/>
Combinatorial enumeration of groups, graphs, and chemical compounds /  
G. Polya, R.C. Read. 
 - New York :    Springer-Verlag,    c1987. 
 - vi, 148 p. :    ill. ;    24 cm. 
<br/><br/>Includes bibliographical references ( p. [136]-148.) 
<br/><br/><label>ISBN: </label>0387964134 :     
<br/><br/><label>Subjects--Topical Terms: </label><br/> Combinatorial enumeration problems.
<br/><br/><label>Dewey Class. No.: </label>511.62