Kumar, A <br/><br/>
Discrete structure / 
A Kumar 
 - New Delhi :   Pearl Books,   2008 
 - 264 p.  23 cm. 
<br/><br/><label>ISBN: </label>	9788189979218 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Permutation;Mathematics
<br/><br/><label>Dewey Class. No.: </label>511.1  / KUD