Systems theory applied to agriculture and the food chain 
edited by J.G.W. Jones and P.R. Street. 
 - London  Elsevier Applied Science  1990 
 - 365 pages ;  24 cm. 
<br/><br/><label>ISBN: </label>1851665102 
<br/><br/><label>Subjects--Topical Terms: </label><br/>System theory<br/>Agriculture