DOI:
10.1055/s-00000112
ZWR - Das Deutsche Zahnärzteblatt
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References
Ismail AL, Morrison EC, Burt BA. et al.
Natural history of periodontal disease in adults: findings from the Tecumseh Periodontal Disease Study, 1959-87.
J Dent Res 1990;
69: 430-435
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