title: [Aleksei Pavlovich Popov (on his 75th birthday)].
mesh_terms: D000337:Aerospace Medicine / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D014586:USSR
vernacular_title: Alekseĭ Pavlovich Popov (k 75-letiiu so dnia rozhdeniia.