title: Identification of chlorinated dibenzofurans in American polychlorinated biphenyls.
mesh_terms: D001140:Aroclors / Q000032:analysis; D001572:Benzofurans / Q000302:isolation & purification*; D002849:Chromatography, Gas; D004787:Environmental Pollution; D006843:Hydrocarbons, Chlorinated / Q000302:isolation & purification; D009656:North America; D011078:Polychlorinated Biphenyls / Q000032:analysis*
chemical_list: D001140:Aroclors; D001572:Benzofurans; D006843:Hydrocarbons, Chlorinated; D011078:Polychlorinated Biphenyls