[Prospects of studying maiignant tumors of the upper respiratory tract and their geographic distribution].
D000349:Africa; D001208:Asia; D006801:Humans; D012142:Respiratory Tract Neoplasms / Q000453:epidemiology*; D014586:USSR; D014481:United States
O perspektivakh izucheniia zlokachestvennykh opukholeĭ verkhnikh dykhatel'nykh puteĭ i ikh geograficheskom rasprostranenii.