Grigg, David B. <br/><br/>
The agricultural systems of the world :  an evolutionary approach / 
D. B. Grigg. 
 - London ;  New York :  Cambridge University Press,  1974. 
 - ix, 358 p. :  maps ;  24 cm. 
 - Cambridge geographical studies ;  5 .
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 308-343. 
<br/><br/><label>ISBN: </label>9780521098434 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural geography.<br/>Agriculture--History.
<br/><br/><label>Dewey Class. No.: </label>630.9 GRI