title: CEN air quality standards--an update.
authors.affiliation: Health and Safety Laboratory, UK.
authors.forename: Richard H
authors.initials: RH
authors.lastname: Brown
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000517:prevention & control* / Q000706:statistics & numerical data*; D004777:Environment; D004784:Environmental Monitoring; D005060:Europe; D006801:Humans; D011786:Quality Control; D012016:Reference Values
chemical_list: D000393:Air Pollutants