[Results of mass administration of vitamins to school children in the extreme northern conditions].
D002648:Child; D006801:Humans; D014801:Vitamin A; D014812:Vitamin K; D014815:Vitamins / Q000627:therapeutic use*
D014815:Vitamins; D014801:Vitamin A; D014812:Vitamin K
VITAMINS/therapeutic use
Opyt massovoi vitaminizatsii shkol'nikov v usloviiakh krainogo severa.