[FLUORINE IN THE NATURAL WATERS OF THE CHUVASH AUTONOMOUS SSR].
D005459:Fluorides; D005461:Fluorine; D014586:USSR; D014867:Water; D014881:Water Supply
D014867:Water; D005461:Fluorine; D005459:Fluorides
FLUORINE; USSR; WATER SUPPLY
FTOR V PRIRODNYKH VODAKH CHUVASHSKO I ASSR.