Johnsonbaugh, R. <br/><br/>
Discrete mathematics / 
Johnsonbaugh, R. 
 - 6th ed. 
 - New Delhi:  Pearson education,  2005. 
 - 685p;25cm 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>8131712877 
<br/><br/><label>Dewey Class. No.: </label>512 JOH