00844cam a22002411 4500 e 25000391 DLC 20260227111216.0 891011s1925 dcu 000 0 eng c e 25000391 (OCoLC)20478157 U.S. Bur. of Education Lib. OO DLC premarc LB3405 .U5 no. 9 RK91.R6 Rogers, James Frederick, 1870-1965. The training of dental hygienists, by James Frederick Rogers. Washington, Government Printing Office, 1925. 4 p. 23 cm. United States. Office of Education. School health studies, no. 9 Caption title. At head of title: ... Department of the Interior. Bureau of Education. Washington, D.C. Teeth Care and hygiene. 20776 20776