title: Polycyclic aromatic hydrocarbon levels in eastern Ontario drinking waters, 1978.
mesh_terms: D013058:Mass Spectrometry; D009864:Ontario; D011083:Polycyclic Compounds / Q000032:analysis*; D013997:Time Factors; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
chemical_list: D011083:Polycyclic Compounds; D014873:Water Pollutants; D014874:Water Pollutants, Chemical