Yadav J.S. <br/><br/>
Evaluation of agricultural extension a studay of Hrayana 

 - 1st 
 -  Concept publishing company, New Delhi  1992 
<br/><br/><label>ISBN: </label>81-85873-28-3 
<br/><br/><label>Dewey Class. No.: </label>630.715YAD