Proceedings of the ninth symposium of the international society for tropical root crops, held at Accra, Ghana, 20-26 October 1991 /    
Edit ors: F. Ofori and S. K. Hahn. 
 - Netherlands :   ISTRC ,   1994. 
 - 531 p. ;    24 cm. 
<br/><br/><label>ISBN: </label>9781310944 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tropical crops --------Congresses.