Wilkinson, T S <br/><br/>
Methodology and techniques of social research 

 - 9th ed. 
 - Bombay  Himalaya Publishing House  1992 
 - 456 p. 
<br/><br/><label>ISBN: </label> RS175 
<br/><br/><label>Dewey Class. No.: </label>300.72 W654M