[Incidence of caries in permanent teeth of schoolchildren in the flatland and mountainous regions of the Veliko Turnovo region, in relation to the fluoride content of drinking water].
D003731:Dental Caries / Q000453:epidemiology; D005459:Fluorides / Q000032:analysis; D014881:Water Supply / Q000032:analysis
D005459:Fluorides
Prouchvane na epidemichnostta na kariesa na postoiannite zŭbi vsred uchashtite se v polski i planinski raioni na velikotŭrnovski okrug vuv vruzka sus sudurzhanieto na fluor v piteĭnite vodi