title: [S. P. Grigor'ev (on the 50th anniversary of his death)].
mesh_terms: D049672:History, 19th Century; D049673:History, 20th Century; D011871:Radiology / Q000266:history; D014586:USSR
vernacular_title: S. P. Grigor'ev (k 50-letiiu so dnia smerti.