[The problem of the prevention of pneumoconiosis in the USSR].
D049673:History, 20th Century; D006801:Humans; D009787:Occupational Medicine / Q000266:history*; D011009:Pneumoconiosis / Q000266:history / Q000517:prevention & control*; D014586:USSR
Problema profilaktiki pnevmokoniozov v SSSR.