title: [Alfred Grotjahn (1869-1931) and the young Soviet Union].
mesh_terms: D005858:Germany; D049672:History, 19th Century; D049673:History, 20th Century; D006920:Hygiene / Q000266:history; D014586:USSR
vernacular_title: Alfred Grotjahn (1869-1931) und die junge Sowjetunion.