title: Comparative extraction of chlorinated hydrocarbon insecticides from soils 20 years after treatment.
mesh_terms: D003102:Colloids; D005069:Evaluation Studies as Topic; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000032:analysis*; D008722:Methods; D010573:Pesticide Residues / Q000032:analysis*; D012987:Soil / Q000032:analysis*; D013997:Time Factors
chemical_list: D003102:Colloids; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D010573:Pesticide Residues; D012987:Soil