title: [General problems of biology in works by Friedrich Engels (on the 150th anniversary of his birth)].
mesh_terms: D001695:Biology / Q000266:history*; D005197:Famous Persons; D005858:Germany; D049672:History, 19th Century
vernacular_title: Obshchie problemy biologii v trudakh Fridrikha Engel'sa (k 150-letiiu so dnia rozhdeniia)