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Dental survey of school children, ages 6-14 years made in 1933-34 in 26 states
C. T. Messner · Government Printing Office
248 sayfa · 1936
Dental care / Children / School children / Dental Health Surveys
A survey of dental activities of state departments and institutions of the United States
F. C. Cady, H. T. Dean, C. T. Messner · U.S. Govt. Printing Office
217 sayfa · 1936
Dental Care / Dental Facilities