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13. [Pathogenesis of periodontal diseases]. HELD JA. Rass Odontotec; 1952 Feb; 33(3):347-51. PubMed ID: 13014388 [No Abstract] [Full Text] [Related]
14. Emotional factors in periodontal disease. MOULTON R, EWEN S, THIEMAN W. Oral Surg Oral Med Oral Pathol; 1952 Aug; 5(8):833-60. PubMed ID: 12983057 [No Abstract] [Full Text] [Related]
15. [Clinical results of local penicillin administration with and without sulfonamide in periapical periodontal disease of permanent teeth in children]. KROHN C. Odontol Tidskr; 1951 Aug; 59(4):251-67. PubMed ID: 14891140 [No Abstract] [Full Text] [Related]