Martin, George E. <br/><br/>
Counting   The art of enumerative combinatorics 

 - New York  Springer-Verlag  2001 
 - xi, 250p. Bibl., Index. 
 - Undergraduate texts in Mathematics .
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<br/><br/><label>ISBN: </label>038795225X 
<br/><br/><label>Dewey Class. No.: </label>511.6  / M381.CA