khan, j a <br/><br/>
research methdology  

 - 1 
 - new delhi   a p h publishing corporation 
 - 319p; 22cmsp 
<br/><br/><label>ISBN: </label>81-313-0036-6 
<br/><br/><label>Dewey Class. No.: </label>1.42  / kha/res