1. Toothbrushing;American Dental Association,1957
2. You can teach toothbrushing;American Dental Association,1960
3. How to educate high school students in oral hygiene;Arnim;J. Health, Phys. Educ. & Recreat.,1960
4. Experimental design: theory and application;Federer,1955
5. Oral hygiene index: a method for classifying oral hygiene status;Greene;J.A.D.A.,1960