title: The problem of maintaining the fluoride level in fluoridating water supplies.
mesh_terms: D005457:Fluoridation / Q000379:methods; D005459:Fluorides / Q000032:analysis*; D007878:Legislation as Topic; D013023:South Dakota; D013781:Texas; D014881:Water Supply / Q000032:analysis*
chemical_list: D005459:Fluorides