Quantitativ techniques in management/ 
Vohra,N.D. 
 - 4th.ed 
 - New Delhi:  Mcgraw hill,  2014. 
 - 1063 
<br/><br/><label>ISBN: </label>9789351340157 
<br/><br/><label>Dewey Class. No.: </label>658.0727  / VOH/Q