title: Past and present exposure determination techniques for benzene, toluene and xylene.
mesh_terms: D000395:Air Pollutants, Occupational / Q000032:analysis*; D001554:Benzene / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods*; D014050:Toluene / Q000032:analysis*; D014992:Xylenes / Q000032:analysis*
chemical_list: D000395:Air Pollutants, Occupational; D014992:Xylenes; D014050:Toluene; D001554:Benzene