title: [Incidence of rheumatic fever in Warsaw children in the years 1964 and 1969].
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D011044:Poland; D012213:Rheumatic Fever / Q000453:epidemiology*; D012621:Seasons
vernacular_title: Zachorowalność na goraczke reumatyczna wsród dzieci warszawskich w latach 1964 i 1969