[WHO guidelines for air quality in Europe].
Ewers
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D000393:Air Pollutants / Q000032:analysis; D000397:Air Pollution / Q000517:prevention & control*; D005060:Europe; D006801:Humans; D008452:Maximum Allowable Concentration; D014944:World Health Organization
D000393:Air Pollutants
WHO-Leitwerte für die Luftqualität in Europa.