title: [PRIMARY MULTIPLE MALIGNANT TUMORS].
mesh_terms: D003604:Czechoslovakia; D006801:Humans; D009369:Neoplasms / Q000453:epidemiology*; D009378:Neoplasms, Multiple Primary
keywords: CZECHOSLOVAKIA; NEOPLASM STATISTICS
vernacular_title: PRIM'ARNA MULTIPLICITA MAL'IGNYCH N'ADOROV.