[Characteristics of rare metals; industrial hygiene].
D006920:Hygiene; D007221:Industry; D008670:Metals; D009784:Occupational Diseases; D016272:Occupational Health; D009790:Occupations
D008670:Metals
INDUSTRY AND OCCUPATIONS/hygiene
Obshchaya kharakteristika redkikh metallov s tochki zreniya higieny truda.