The role of root crops in regional food security and sustainable agr iculture :    proceedings of the Workshop held from october 29 to 2 Nov ember 19990 Mansa, Zambia /  
edited by M.N. Alvarez 
 - Ibadan :    The International Intitute of Tropical Agriculture ,    1991. 
 - xv,149 p. :    ill. ;    24 cm. 
<br/><br/><label>ISBN: </label>9781310731 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Food security -- Congresses.<br/> Agriculture -- Congresses.<br/> Sustainable agriculture -- Congresses.
<br/><br/><label>Dewey Class. No.: </label>630