Drozdov, V N [State of the upper respiratory passages in workers in industrial plants exposed to nickel sulfate vapors]. [electronic resource] - Vestnik otorinolaringologii - 56-8 p. digital Publication Type: English Abstract; Journal Article ISSN: 0042-4668 Subjects--Topical Terms: ElectrolytesHumansNickel--adverse effectsOccupational Diseases--chemically inducedRespiratory Tract Diseases--chemically induced