Biological control in crop production : invited papers presented at a symposium held May 18-21, 1980, at the Beltsville Agricultural Research Center (BARC), Beltsville, Maryland. --
| Format: | Book |
|---|---|
| Language: | English |
| Published: |
London, Sydney :
Granada,
1981.
|
| Series: | Beltsville symposia in agricultural research ;
5) |
| Subjects: |