title: [P. P. Dvizhkov (on his 80th birthday)].
mesh_terms: D049672:History, 19th Century; D049673:History, 20th Century; D009787:Occupational Medicine / Q000266:history; D012425:Russia (Pre-1917); D014586:USSR
vernacular_title: P. P. Dvizhkov (k 80-letiiu so dnia rozhdeniia).