1. Clinical practice of the dental hygienist;Wilkins,1959
2. Periodontology;Coolidge,1958
3. Simplified oral physiotherapy or gingival home care;Mesrobian;J.A.D.A.,1961
4. Research in the toothbrush;Klmmelman;J. Albert Einstein M. Center,1957
5. Toothbrushes, toothbrush materials and design;McCauley;J.A.D.A.,1946