[On air pollution in cities with sulfur dioxide and establishment of the maximum permissible concentration of SO2 discharge into the air].
D000397:Air Pollution; D002947:Cities; D013455:Sulfur / Q000633:toxicity*; D013458:Sulfur Dioxide
D013458:Sulfur Dioxide; D013455:Sulfur
AIR POLLUTION; SULFUR/toxicology