Degras, L. <br/><br/>
The Yam:  A Tropical Root Crop. 

 - London  Macmillan  1986 
 - Xv; 408p.  Drawings, Tables 
<br/><br/><label>ISBN: </label>0333574567 
<br/><br/><label>LC Class. No.: </label>SB211  / .Y3D36