Mergenhagen, S.E., Hampp, E.G., and Scherp, H.W.Endotoxins from Oral Bacteria, J. D. Res., 39: 686, 1960 (abstr.).
2.
Menkin, V.Biochemical Mechanisms in Inflammation. 2d ed. Springfield, Ill.: Charles C Thomas , 1956.
3.
Schultz-Haudt, S., Dewar, M., and Bibby, B.G.Effects of Hyaluronidase on Human Gingival Epithelium, Science, 117: 653, 1953 .
4.
Thonard, J.C.Connective Tissue Components in Relation to Periodontal Disease. Ph.D. thesis, University of Rochester School of Medicine and Dentistry , Rochester, New York, 1960.
5.
Lisanti, V.F.Hydrolytic Enzyme Sources and Periodontal Disease , J. D. Res., 37 :63, 1958 (abstr.).
6.
Thonard, J.C. , and Scherp, H.W.Resistance of Human Gingival Collagen to Human Gingival Bacteria, Proc. Soc. Exptl. Biol. Med., 96 :165, 1957.
7.
Fitzgerald, R.J., and McDaniel , E.G., Dental Calculus in the Germfree Rat, Arch. Oral Biol., 2:239,1960.
8.
Baarregaard, A.Dental Conditions and Nutrition among Natives in Greenland, Oral Med., Oral Surg. & Oral Path., 2: 995, 1949.
9.
Fitzgerald, R.J., and Keyes, P.H.Demonstration of the Etiologic Role of Streptococci in Experimental Caries in the Hamster, J.A.D.A., 61: 9, 1960.