AU  - Ferwerda,F P.
AU  - Wit,F.
TI  - Outlines of perennial crop breeding in the tropics / 
U1  - 631.5230913 
PY  - 1969///
CY  - Wageningen : 
PB  - H Veenman and Zonen N V , 
KW  - Development of Hybrids and new varieties
KW  - Tropics
ER  -