Chronic general periodontitis: "Periodontal disease" (Pyorrhoea alveolaris) / by J.F. Colyer.

  • Frank Colyer
Date:
1916

Licence: Public Domain Mark

Credit: Chronic general periodontitis: "Periodontal disease" (Pyorrhoea alveolaris) / by J.F. Colyer. Source: Wellcome Collection.

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