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Bibby, B.G.: Use of Fluorine in the Prevention of Dental Caries, J. A. D. A. 31: 228, 1944.
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Knutson, J.W. , and Armstrong, W.D.: The Effect of Topically Applied Sodium Fluoride on Dental Caries Experience. II. Report of Findings for Second Study Year, Pub. Health Rep. 60: 1085, 1945.
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Knutson, J.W. , and Armstrong, W.D.: The Effect of Topically Applied Sodium Fluoride on Dental Caries Experience. III. Report of Findings for the Third Study Year, Pub. Health Rep. 61: 1683, 1946.
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Knutson, J.W. , Armstrong, W.D., and Feldman, F.M.: The Effect of Topically Applied Sodium Fluoride on Dental Caries Experience. IV. Report of Findings with Two, Four, and Six Applications, Pub. Health Rep. 62: 425, 1947.
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Jordan, W.A., Wood, O.B., Allison, J.A., and Irwin, V.D.: The Effects of Various Numbers of Topical Applications of Sodium Fluoride , J. A. D. A. 33: 1385, 1946.
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Klinkenberg, E., and Bibby, B.G.: The Effect of Topical Applications of Fluorides on Dental Caries in Young Adults, J. D. Res. 29: 4, 1950.
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Crawford, H.M. : Clinical Results of Impregnation, Texas D. J. 67: 52-55, 1949.
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Younger, H.B. : Clinical Results of Caries Prophylaxis by Impregnation , Texas D. J., 67: 96-98, 1949.
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Gillard, H.F. , Boelsche, R.A., and Summers, F.G.: Clinical Report on Caries Control, Houston District Dent. J., 1949.