King, J.D., and Glover, R.E.: The Relative Effects of Dietary Constituents and Other Factors upon Calculus and Gingival Disease in the Ferret, I Path Bact57:353-362, 1945.
2.
Anderson, A.C. : Long Term Effects of X-Radiation on the Beagle, Annual Progress Report No. 14, April 1965, prepared for the San Francisco Operations Office, US Atomic Energy Commission.
3.
Suomi, J.D.: Periodontal Disease and Oral Hygiene in an Institutionalized Population: Report of an Epidemiological Study, J Periodont40:5-10, 1969.
4.
Suomi, J.D.; Greene, J.C.; Vermillion, J.R.; Chang, J.L.; and Leatherwood, E.C. : The effect of Controlled Oral Hygiene Procedures on the Progression of Periodontal Disease in Adults: Results After Two Years , J Periodont40:416-420, 1969.
5.
Loe, H.: Present Day Status and Direction for Future Research on the Etiology and Prevention of Periodontal Disease, J Periodont40:678-682, 1969.