Biswal , Purna Chandra  . <br/><br/>
Discrete mathematics and graph theory /  
by Purna Chandra Biswal. 
 - 3rd ed. /  
 - New Delhi :   PHI Learning Private Ltd. ,   2013 
 - viii, 689p :  
<br/><br/><label>ISBN: </label>978-81-203-4691-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics- Discrete
<br/><br/><label>Dewey Class. No.: </label>BV:(B)  / Q3;4