The main trends in research on the hard tissues of the teeth in the U.S.S.R.
D003731:Dental Caries / Q000209:etiology*; D004194:Disease; D006801:Humans; D011506:Proteins / Q000378:metabolism; D012106:Research; D014070:Tooth; D014131:Trace Elements / Q000378:metabolism; D014586:USSR
D011506:Proteins; D014131:Trace Elements