TY  - BOOK
AU  - Mackauer,Manfred  .
AU  - Ehler,Lester E..
AU  - Roland,Jens  .
TI  - Critical issues in biological control / 
SN  - 0946707197
U1  - 632.96 
PY  - 1990///
CY  - Andover : 
PB  - Intercept , 
KW  - PLANT-DISEASE
N1  - Include index
ER  -