Grigg, David B. <br/><br/>
The agricultural systems of the world :  an evolutionary approach / 
D. B. Grigg. 
 - London ; New York :  London ; New York :  Cambridge University Press,  1974. 
 - Cambridge geographical studies ;  5 .
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 308-343. 
<br/><br/><label>ISBN: </label> L.6.60 ( 
<br/><br/><label>LCCN: </label>73082451 
<br/><br/><label>Nat. Bib. No.: </label>GB*** 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural geography.<br/>Agriculture -- History.--Agriculture -- History.
<br/><br/><label>LC Class. No.: </label>S439  / .G788 
<br/><br/><label>Dewey Class. No.: </label>630/.9