[The state of the periodontium in the workers in the North].
D001205:Ascorbic Acid / Q000097:blood; D003081:Cold Climate; D003753:Dental Health Surveys; D006801:Humans; D009909:Oral Health; D010510:Periodontal Diseases / Q000453:epidemiology*; D010512:Periodontal Index; D014586:USSR
D001205:Ascorbic Acid
Sostianie parondonta u rabochikh v usloviiakh Servera.