Grigg, D. B. <br/><br/>
The Agricultural systems of the World :   an evolutionary approach /  
D.B. Grigg. 
 - Cambridge :   Cambridge University Press ,   1974 
 - ix, 358 p. :    ill. ;    23 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0521098432 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture.--------
<br/><br/><label>Dewey Class. No.: </label>630.9