Planned change in farming systems :  progress in on-farm research / 
edited by Robert Tripp. 
 - New York :  J. Wiley ;  Co-publication with Sayce Pub.,  c1991. 
 - x, 348 p. :  ill., maps ; 
<br/><br/><label>ISBN: </label>0471934178 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--Research--On-farm.<br/>Agricultural systems--Research.
<br/><br/><label>LC Class. No.: </label>S540.O53P58 1991