[The importance of the works of S. M. BOGOSLOVSKII (1870-1931). (On the 90th anniversary of his birth)].
D000846:Anniversaries and Special Events; D049672:History, 19th Century; D049673:History, 20th Century; D036801:Parturition; D012499:Sanitation; D014937:Work
BIOGRAPHIES; SANITATION