title: [Optimizing the hygiene education of younger schoolchildren].
mesh_terms: D002648:Child; D002675:Child, Preschool; D006266:Health Education / Q000379:methods*; D006293:Health Promotion / Q000379:methods; D006801:Humans; D014586:USSR
vernacular_title: Optimizatsiia gigienicheskogo vospitaniia mladshikh shkol'nikov.