[HYGIENIC SIGNIFICANCE OF NATURAL RADIOACTIVITY IN MINING AND CONCENTRATION OF SOME RARE METAL ORES AND ITS ROLE IN THE DEVELOPMENT OF PNEUMOCONIOSIS].
D008670:Metals; D008906:Mining; D011009:Pneumoconiosis; D011851:Radioactivity
D008670:Metals
METALS; MINING; PNEUMOCONIOSIS; RADIOACTIVITY