title: On the course of epidemics of some infectious diseases.
authors.forename: P D
authors.initials: PD
authors.lastname: En'ko
mesh_terms: D003141:Communicable Diseases / Q000453:epidemiology* / Q000276:immunology; D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D049672:History, 19th Century; D006801:Humans; D012425:Russia (Pre-1917) / Q000453:epidemiology