Kumar, Krishan <br/><br/>
Research Methods in Library and Information Science 

 - Second Revised Edition 
 - New Delhi  Har-Anand Publications Pvt Ltd  1992 
 - 349 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>020.72