TY  - BOOK
AU  - Papavizas, George C., ed.
TI  - Biological control in crop production : invited papers presented at a symposium organized by BARC Committee sponsared by and held at May 18 - 21 1980, at the Beltsville Agricultural Research Centre (BARC), Beltsville, Maryland, 20705
T2  - (Beltsville symposia in agricultural research; 5)
SN  - 9780246115126
PY  - 1981///
CY  - Granada
PB  - Allanheld, Osmun Publishers
ER  -