Quantative techniques 
Kothari C.R 
 - 3rd revised edition. 
 - India,  Vikas Publishing house  1984. 
 - 596p. 
<br/><br/><label>ISBN: </label>0-7069-8745-4 
<br/><br/><label>Subjects--Topical Terms: </label>--School of Pure and Applied Sciences
<br/><br/><label>LC Class. No.: </label>QA 276   / .K68 1984