[Air pollution with sulfur dioxide in various industrial districts of Bulgaria].
D000397:Air Pollution; D002031:Bulgaria; D007220:Industrial Waste; D013458:Sulfur Dioxide / Q000009:adverse effects*
D007220:Industrial Waste; D013458:Sulfur Dioxide
Verunreinigung der Atmosphäre mit Schwefeldioxyd in verschiedenen Industriebezirken Bulgariens.