Dalton, G. E. <br/><br/>
Study of agricultural systems 

 - London :  Applied Science,  1975 
 - 441 p.  : gráfs 
<br/><br/><label>LCCN: </label>10509 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sistemas de cultivo.
<br/><br/><label>Dewey Class. No.: </label>631.5  / D3