Perspectives on farming systems research and extension 
edited by Peter E. Heildebrand 
 - Boulder  Lynne Rienner  1986 
 - 167p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural extension<br/>Agricultural research
<br/><br/><label>Dewey Class. No.: </label>Z084 H544