title: [Basic trends in the social-hygienic studies concerning the improvement of the maternal and child health services].
mesh_terms: D002648:Child; D002662:Child Health Services; D005260:Female; D006801:Humans; D008427:Maternal Health Services; D014586:USSR
vernacular_title: Osnovnye napravleniia sotsial'no-gigienicheskikh issledovaniĭ po sovershenstvovaniiu okhrany zdorov'ia materi i rebenka.