Hilderbrand P E <br/><br/>
perspectives on Farming systems research and extension 
E Hilderbrand 
 - London   Lynne rienner pub  1986 
<br/><br/><label>ISBN: </label>0861876695 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural Systems
<br/><br/><label>LC Class. No.: </label>S 494.5 .S9H5