Degras, Lucien. <br/><br/>
The yam :  a tropical root crop / 
edited by Rene Coste. 
 - London :  Macmillan,  1993. 
 - xv, 408 p. :  ill. 
<br/><br/><label>ISBN: </label>0333574567 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Yams.<br/>Tropical crops.<br/>Root-crops--Tropics.