1. Appraisal of developments in periodontology from 1901–1950;Leonard;J. Periodont.,1951
2. Surgery’s place in the treatment of periodontoclasia;Merritt;J.A.D.A.,1942
3. Suppurative gingivitis with alveolar involvement. A new surgical procedure;Zentler;J.A.M.A.,1918
4. Periodontia: a study of the histology, physiology and pathology of the periodontium and the treatment of its diseases;Goldman,1949
5. Periodontia: a study of the histology, physiology and pathology of the periodontium and the treatment of its diseases;Goldman,1949