Bethesda, Md. U.S. Division of Dental Health 1970 .
vi, 142 p. , Sponsored by the Public Health Service Division of Dental Health and the Dept. of Community Dentistry, University of Maryland School of Dentistry.

Bethesda, Md. Division of Dental Health, National Institutes of Health; for sale by the Supt. of Docs., U.S. Govt. Print. Off., Washington 1970 .
vii, 231 p. , "Sponsored by Tufts University School of Dental Medicine." 28 cm..

By Echevarría, Edgar..
Puerto Rico [s.n.] 1989 .
v, 189 p. 22 cm..