title: [Etiological features of premature labor in Tolbukhin District in 1982].
mesh_terms: D000328:Adult; D002031:Bulgaria; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D007752:Obstetric Labor, Premature / Q000453:epidemiology / Q000209:etiology*; D010298:Parity; D011247:Pregnancy; D012306:Risk; D012621:Seasons; D012959:Socioeconomic Factors; D014798:Vital Statistics
vernacular_title: Prouchvaniia vŭrkhu niakoi etiologichni momenti na prezhdevremennite razhdaniia v Tolbukhinski okrŭg prez 1982 g.