Allenby, R.B.J.T. <br/><br/>
How to count   : an introduction to combinatorics / 

 - 2nd 
 - Boca Raton:  CRC Press,  2011 
 - xv, 430p. Index 
 - Discrete mathematics and its applications .
<br/><br/><label>ISBN: </label>9781420082609 
<br/><br/><label>Dewey Class. No.: </label>511.6  / Al432.HC