Spedding, Colin Raymond Willian. <br/><br/>
An introduction to agricultural systems 

 - 2ed. 
 - London :  Elsevier Applied Science,  1988 
 - 189 p. 
<br/><br/> 1993-221 
<br/><br/><label>LCCN: </label>65585 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecología agrícola.<br/>Ecosistema.<br/>Sistemas de cultivo.
<br/><br/><label>Dewey Class. No.: </label>630.215  / S63 1988