title: [Basic problems in the hygiene of children of preschool age].
mesh_terms: D002675:Child, Preschool; D006801:Humans; D006920:Hygiene; D010372:Pediatrics; D012572:School Health Services; D014586:USSR
vernacular_title: Osnovnye voprosy gigieny deteĭ doshkol'nogo vozrasta