TY  - JA
AU  - Campbell,A.
AU  - Mackauer,M.
TI  - Some climatic effects on the spread and abundance of two parasites of the pea aphid in British Columbia (hymenoptera:  aphididae-homoptera: aphididae)
PY  - 1973///
T2  - Zeitschrift fuer Angewandte Entomologie
ER  -