Proceedindgs 
/ of the sixith symposium of the International Society for Tropical Root Crops, hosted by CIP in Lima, Perou 21-26 February1983 
. - Lima  : International Potato Center, 1984
. - XVII-671 p.  ; 27 cm. 
<br/><br/><label>Source: </label> don 
<br/><br/><label>Universal Decimal Class. No.: </label>633.4