00375nam a2200097Ia 4500008004100000082002000041100002100061245014200082260004500224300000800269140113s9999 xx 000 0 und d a595.7:632.7 N5 a"Knipling, E.F." aPrinciples of Insect parasitism analysed from new perspctives practical implications for regulating insect population by biological means a1995bUnited States Dept. Of Agric.cUSA a335