title: [Grigoriĭ Pavlovich Matveĭkov (on his 50th birthday)].
mesh_terms: D049673:History, 20th Century; D002094:Republic of Belarus; D012219:Rheumatology / Q000266:history
vernacular_title: Grigoriĭ Pavlovich Matveĭkov (k 50-letiiu so dnia rozhdeniia).