Grigg, D. B. <br/><br/>
The agricultural systems on the world; an evolutionary approach 

 - London :  Cambridge University,  1974 
 - 358 p.  : mapas 
 - Cambridge Geographical studies  ; 5 .
 - Cambridge Geographical studies  ; 5 .
<br/><br/><label>LCCN: </label>15361 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura.<br/>Agricultura--Historia.
<br/><br/><label>Dewey Class. No.: </label>630.9  / G7