Agricultural Extension / 
A.W.van den ban, H.S. Hawkins . 
 - 2nd ed. 
 - New Delhi;  CBS Publishers & Distributors,   1996. 
 - viii,294 p,: 
<br/><br/><label>ISBN: </label>8123905769 
<br/><br/><label>LC Class. No.: </label>S544  / .B36 1996