[The importance of indices in epidemiologic research on periodontal diseases].
Leus
P A
PA
D000367:Age Factors; D006801:Humans; D009911:Oral Hygiene Index; D010510:Periodontal Diseases / Q000453:epidemiology*; D010512:Periodontal Index; D012737:Sex Factors; D014586:USSR / Q000453:epidemiology
Znachenie nekotorykh indeksov v épidemiologicheskikh issledovaniiakh bolezneĭ parodonta.