Armstrong, W.D. , and Brekhus, P.J.: Chemical Constitution of Enamel and Dentine , J. Biol. Chem. 120: 677, 1937.
2.
Bowes, J.H., and Murray, M.M.: The Variations in Chemical Composition in Relation to Dental Structure, Biochem . J. 30: 977, 1936.
3.
Deakins, M., and Volker, J.F. : Amount of Organic Matter in Enamel From Several Types of Human Teeth , J. D. Res. 20: 117, 1941.
4.
Steadman, L.T. , Hodge, H.C., and Horn, H.W.: Spectrochemical Studies of Potassium in Bone and Tooth Substance, J. Biol. Chem. 140: 71, 1941.
5.
Bale, W.F., Hodge, H.C., and Warren, S.L.: Roentgen Ray Diffraction Studies of Enamel and Dentine, Am. J. Roentgenol. 32: 369, 1934.
6.
Sobel, A.E., and Sklersky, J.: A Direct Acidimetric Microtitration Method for Calcium, J. Biol. Chem. 122: 665, 1938.
7.
Crowell, C.D. , Hodge, H.C., and Line, W.R.: Chemical Analysis of Teeth Samples Composed of Enamel, Dentine, and Cementum, J. D. Res. 14: 251, 1934.
8.
LeFevre, M.L. , Bale, W.F., and Hodge, H.C.: The Chemical Nature of the Inorganic Portion of Fetal Tooth Substance, J. D. Res. 16: 85, 1937.
9.
LeFevre, M.L. , and Hodge, H.C.: Chemical Analysis of Tooth Sample Composed of Enamel, Dentine, and Cementum, J. D. Res. 16: 279, 1937.
10.
Klement, R. , and Tromel, G.: Hydroxylapatite, der Hauptbestandteil der anorganischen Knochen und Zahnsubstanz, Ztschr. phys. Chem . 213: 263, 1932.
11.
Hendricks, S.B., Hill, W.L., Jacob, K.D., and Jefferson , M.E.: Structural Characteristics of Apatite-Like Substances and Composition of Phosphate Rock and Bone as Determined From Microscopical and X-ray Diffraction Examinations, Ind. Eng. Chem. 23: 1413, 1931.
12.
Hodge, H.C. , and McKay, J.H.: The Microchardness of Teeth, J. A. D. A. 20: 227, 1933.
13.
Tromel, G., and Moller, A.: Die Bildung schwer loslicher Kalziumphosphate aus wassriger Losung und die Beziehungen dieser Phosphate zur Apatitgruppe, Ztschr. Anorg. Chem. 206: 227, 1932.
14.
Bredig, M.A. : Zur Apatitstruktur der anorg. Knochen- und Zahnsubstanz, Ztschr. phys. Chem. 216: 239, 1933 .
15.
Thewlis, J. , Glock, G.E., and Murray, M.M.: Chemical and X-ray Analysis of Dental, Mineral and Synthetic Apatites, Trans. Far. Soc. 35: 358, 1939.
16.
Bale, W.F.: A Comparative Roentgen-Ray Diffraction Study of Several Nature Apatites and the Apatite-Like Constituent of Bone and Tooth Substance, Am. J. Boentgenol. 43: 375, 1940.
17.
Tovborg, J.A. , and Moller, A.: Determination of Size and Shape of the Apatite Particles in Different Dental Enamels and Dentin by the X-Ray Powder Method , J. D. Res. 27: 524, 1948.
18.
Brekhus, P.J. , and Armstrong, W.D.: A Method for the Separation of Enamel, Dentine, and Cementum, J. D. Res. 15: 23, 1935.
19.
Manly, R.S. , and Hodge, H.C.: Density and Refractive Index Studies of Dental Hard Tissues, J. D. Res. 18: 133, 1939.
20.
Abeshouse, B.S., and Weinberg , T.: Experimental Study of Solvent Action of Versene on Urinary Calcium, J. Urol. 65: 2, 1951.
21.
Plumb, R.C., Martell, A.E., and Berswork, F.C.: Series of Metal Complexes of Ethylene Diamine Tetra Acetic Acid. Presented at the Oil Chemists Convention, Oct. 31, 1949, Chicago, Ill.
22.
Samuelson, D. : Ion Exchange in Analytical Chemistry, New York , 1953, John Wiley & Sons, Inc.
23.
Goudie, A.J. , and Rieman, W.M.: Determination of Phosphate by Ion Exchange, Anal. Chem. 24: 1067, 1952.
24.
Kindt, B.H. , Balis, E.W., and Liebhafsky , H.A.: Alkalimetric Determination of Phosphate After Separation of Calcium by Ion Exchange, Anal. Chem. 24: 1501, 1952,
