title: [Comparative studies of the periodontal state in welders].
mesh_terms: D000328:Adult; D000367:Age Factors; D005859:Germany, East; D006801:Humans; D008875:Middle Aged; D009784:Occupational Diseases / Q000453:epidemiology*; D010510:Periodontal Diseases / Q000453:epidemiology*; D010512:Periodontal Index; D012767:Ships; D014896:Welding
vernacular_title: Vergleichende Untersuchungen über den Periodontalzustand bei Schweissern.