Gopal Lal jain <br/><br/>
Research methodology :methods tools and techniques 
by Gopal Lal jain 
 - Jaipur  Mangal deep pub.  1998 
 - 296p. 
<br/><br/><label>ISBN: </label>8175940158 
<br/><br/><label>Dewey Class. No.: </label>001.42 GOP/RES