Subjects: *Hydrocarbons; *Mercury; *PesticidesMassachusetts
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Subjects: *Epidemiology; *Hydrocarbons; *SmokingMassachusetts
Subjects: *Epidemiology; *Gas chromatography; *HydrocarbonsMassachusetts
Subjects: *Tetrachloroethylene; *Drugs of abuse; *HydrocarbonsMassachusetts
Subjects: ANXIETY disorders; HEALTH of cigarette smokers; AFFECTIVE disordersMASSACHUSETTS; PENNSYLVANIA; UNITED StatesUNITED States. Food & Drug Administration
Subjects: *Tetrachloroethylene; *Water pollution; *HydrocarbonsMassachusetts; Rhode Island
Subjects: *Carcinogens; *Hydrocarbons; *Water supplyMassachusetts