Spedding, Colin Raymond Willian. <br/><br/>
The biology of agricultural systems 

 - London :  Academic Press,  1975 
 - 261 p.  ; láms. : ilus. ; gráfs. 
<br/><br/><label>LCCN: </label>57813 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecología agrícola.<br/>Ecología animal.<br/>Ecosistema.
<br/><br/><label>Dewey Class. No.: </label>630.215  / S6