Development of farming systems :  evaluation of the five-year period 1980-1984 / 
J. C. Zadoks (editor) 
 - Wageningen :  Pudoc,  1989 
 - 90 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>9022009696  RM84.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural systems--Nagele--Netherlands