D.B. Grigg <br/><br/>
Agricultural systems of the world : An evolutionary approach 

 - London  Cambridge University Press  1974 
 - 358p 
<br/><br/>D.B. Grigg: Agricultural systems of the world : An evolutionary approach.  London.  Cambridge University Press, 1974. 0521-20269-8--(630GRI)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>ISBN: </label>0521-20269-8 
<br/><br/><label>Dewey Class. No.: </label>630  / GRI