ONE THOUSAND NINE HUNDRED NINETY NINE 805,383 1999 International Workshop for a Classification of Periodontal Diseases and Conditions. - Chicago s:The American Academy of Per IodontoIogy, 1999. - [4], 112 s. ; 28 cm. - (Annals of PeriodontoIogy ; vol. 4, nr. 1) Bibliogr. przy rozdz.