Orban, Balint J. Orban's periodontics : A Concept-Theory and Practice / - 4th edition - United State of America . : The C. V. Mosby Company . ; 1972. - xix, 652 pages : ill . ; (part color) ; 25 cm. includes references and index Subjects--Topical Terms: Periodontics. Dewey Class. No.: 617.632