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

 - 2 ed. 
 - London :  Elsevier,  1988 
 - 189 p.  : ilus. ; gráfs. 
<br/><br/><label>LCCN: </label>63581 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sistemas de cultivo.
<br/><br/><label>Dewey Class. No.: </label>631.5  / S64 1988