title: Polychlorinated biphenyl concentrations in sewage and sludges of some waste treatment plants in southern Ontario.
mesh_terms: D009864:Ontario; D006109:Poaceae / Q000032:analysis; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D012722:Sewage / Q000032:analysis*; D003313:Zea mays / Q000032:analysis
chemical_list: D012722:Sewage; D011078:Polychlorinated Biphenyls