title: [60th birthday of N. N. Trakhtman].
mesh_terms: D049673:History, 20th Century; D009787:Occupational Medicine / Q000266:history; D014586:USSR; D014876:Water Pollution / Q000517:prevention & control
vernacular_title: K 60-letiiu so dnia rozhdeniia N. N. Trakhtman.