TY  - BOOK
AU  - Berrg, Henk van den
AU  - 
TI  - Natural control of helocoverpa armigera in small holder crops in East Africa
SN  - 90-5485-107-4
U1  - 633.1 
PY  - 0000///
CY  - 
PB  - 
KW  - Helicoverpa armigera
N1  -  Thesis Wageningen
ER  -