title: [2 letters of F. F. Erisman].
mesh_terms: D005197:Famous Persons; D049672:History, 19th Century; D006920:Hygiene / Q000266:history; D011635:Public Health Administration / Q000266:history; D012425:Russia (Pre-1917)
vernacular_title: Dva pis'ma F. F. Erismana.