Allenby, R. B. J. T. <br/><br/>
How to count :  an introduction to combinatorics / 
R.B.J.T. Allenby, Alan Slomson. 
 - 2. ed. 
 - Boca Raton, FL. :  CRC Press,  2011. 
 - xv, 430p. :  ill. ;  27 cm. 
 - Discrete mathematics and its applications .
 - Discrete mathematics and its applications .
<br/><br/> Includes bibliographical references and index.  First published as: an introduction to combinatorics, 1991. 
<br/><br/><label>ISBN: </label>9781420082609 (hardback) 1420082604 (hardback) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial analysis.