residues of chlorinated hydrocarbon insectidies and some of their metabolites , including p , p'-ddt , p , p'-ddd , p , p'-dde , gamma-bhc , aldrin , dieldrin , heptachlor and heptachlor epoxide , were examined in the soils collected from 21 tea-gardens distributed in 15 countries of 6 prefectures in 1977 , and from 100 locations distributed in 46 counties of 10 prefectures in 1984 in taiwan .
C0020247
chlorinated hydrocarbon
C0002011
aldrin