Polya, George and Others <br/><br/>
Notes on introductory combinatorics   
By George Polya, Robert E. Tarjan and Donald R. Woods 
 - Boston  Birkhauser  1983 
 - 190p. 
 - Progress in computer science   no. 4 .
<br/><br/>  
<br/><br/><label>Dewey Class. No.: </label>511.6  / P781.NI