Hyatt, T.P.: Statistical Study of Location of Dental Caries, D. Digest34: 235, 1928.
2.
Bodecker, C.F. : Bacteria in Relation to Enamel Fissures, D . Items Interest48: 797, 1926.
3.
Brucker, M.: Studies on the Incidence and Cause of Dental Defects in Children, VI. Pits and Fissures, J. D. Res. 23: 89, 1944.
4.
Brucker, M.: Studies on the Incidence and Cause of Dental Defects in Children, VII. Fissures and Caries, J. D. Res. 23: 101, 1944.
5.
Brucker, W.H.: The Incidence of. Involvements of the First Permanent Molar. A Statistical Investigation on the Findings in Six Hundred First Permanent Molars in One Hundred and Five College Freshmen, Thesis, Philadelphia , March, 1941, Thomas W. Evans Museum and Dental Institute.
6.
Dwyer, H.S.: A Study of the Liability to Decay of the Deciduous Molars of School Children , J. D. Res. 12: 911, 1932.
7.
Medical Research Council, Report of the Committee for the Investigation of Dental Disease. II. The Incidence of Dental Disease in Children, London, 1925, His Majesty's Stationary Office.