Alternatives to gold alloys in dentistry : proceedings of a conference held at the National Institutes of Health, Bethesda, Maryland, January 24-26, 1977
[Bethesda, Md.] : Dept. of Health, Education, and Welfare, Public Health Service, National Institutes of Health ; Washington : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977