title: [Studies on the ratio of free sulfuric acid to sulfur dioxide in the air of large cities].
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002980:Climate; D013458:Sulfur Dioxide / Q000032:analysis*; D013464:Sulfuric Acids / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D013464:Sulfuric Acids; D013458:Sulfur Dioxide
vernacular_title: Untersuchungen zum Verhältnis von freier Schwefelsäure zu Schwefeldioxid in Grossstadtluft