Willard, H.H. , and Winter, O.B.: Volumetric Method for Determination of Fluorine, Indust. Engin. Chem. (Anal. Ed.)5: 7-10, 1933.
2.
Fluorine, Association of Official Agricultural Chemists, J. Assoc. Official Agr. Chem. 27: 90, 1944.
3.
McClure, F.J. : Fluorides in Food and Drinking Water, Natl . Inst. Health Bull. 172: 1-53, 1939c.
4.
Clifford, P.A. : Report on Fluorine, J. Assoc. Official Agr. Chem.28: 1945.
5.
Paffenbarger, G.C., Schoonover, I.C., and Souder, W.: Dental Silicate Cements, J. A. D. A. 25: 32-87, 1938.
6.
Armstrong, W.D. : Fluorine Content of Enamel and Dentin of Sound and Carious Teeth, J. Biol. Chem.119: V-VI, 1937.
7.
Armstrong, W.D. , and Brekhus, P.J.: Fluorine Content of Enamel of Sound and Carious Teeth, J. D. Res. 16: 309-310, 1939.
8.
Boissevain, C.H., and Drea, W.F.: Spectroscopic Determination of Fluorine in Bones, Teeth, and Other Organs in Relation to Fluorine in Drinking Water , J. D. Res. 13: 495-500, 1933.
9.
Zoller Dental Clinic, Germ Free Animal Study (Unpublished data).
