DOI:
10.1055/s-00000026
Informationen aus Orthodontie & Kieferorthopädie
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References
Armitage GC.
Development of a classification system for periodontal diseases and conditions.
Ann Periodontol 1999;
4 (01) 1-6
DOI: 10.1902/annals.1999.4.1.1.
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