Perspectives on farming systems research and extension  (Book) 

 - Boulder, Colorado  Lynne Rienner  1986 
 - 167 p.  24 cm. 
<br/><br/><label>ISBN: </label>0861876695 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural systems Agricultural systems--Research
<br/><br/><label>Universal Decimal Class. No.: </label>631.5 PER  / 6177