[Problems of occupational medicine in the works of A.N. Sysin].
D049672:History, 19th Century; D049673:History, 20th Century; D009031:Moscow; D009787:Occupational Medicine / Q000266:history*; D012426:Russia; D012425:Russia (Pre-1917)
Voprosy okhrany truda v rabotakh A.N. Sysina.