[The development of experimental trends in several areas of labor hygiene for the past 50 years].
D049673:History, 20th Century; D009787:Occupational Medicine / Q000266:history*; D012106:Research / Q000266:history; D014586:USSR
Razvitie éksperimental'nogo napravleniia v nekotorykh razdelakh gigieny truda za 50 let.