Field crop ecosystems / 
edited by C.J. Pearson 
 - Amsterdam :  Elsevier North-Holland,  1992 
 - 576 p. ;  29 cm. 
 - Ecosystems of the world ;  18 .
<br/><br/><label>LCCN: </label>92-121903 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Field crops<br/>Biotic communities