A textbook of quantitative techniques : 
N.P.Bali & P.N.Gupta . 
 - Bangalore :  University science press ;  2009. 
 - 765 pages. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>9788131807781 
<br/><br/><label>LC Class. No.: </label>HF 5695  / .B35 2009.