Grace, A. M.. Periodontal Control an Effective System for Diagnosis Selection Control and Treatment Planning in General Practice / Textual Documents - 1st ed / . - London : Quintessence Publishing Co, Inc , 1989. - 144: 24.5*17. ISBN: 1602.00 (Paper Binding) Subjects--Index Terms: Periodontology Dewey Class. No.: 617.632 / GRA