TRIPATHI (P C) and SHUKLA (Anita). <br/><br/>
Textbook of research methodology in social sciences. Ed.5. 

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 - N D  Sultan Chand & Sons  2005 
 - xviii,368 
<br/><br/><label>ISBN: </label>81 8054 296 3 
<br/><br/><label>Dewey Class. No.: </label>300.72 TRIT