1. Meaning and scope of epidemiology Chapel Hill, N.C.;Kark,1958
2. Measurement of periodontal disease prevalence;Sandler;J.A.D.A.,1959
3. Indices for prevalence and in cidence of periodontal disease;Ramfjord;J. Periodont.,1959
4. Assessment of malocclusion in population groups;Van Kirk;Am. J. Pub. Health,1959
5. Handicapping labio-lingual deviations: a proposed index for public health purposes;Draker;Bul. Am. A. Pub. Health Den.,1958