1. Letter from Albert Baird Hastings to Marshall W. Nirenberg Publication: Produced: [1962?] Subject(s): United States Public Health Service Archival Collection: The Marshall W. Nirenberg Papers (Profiles in Science)
2. Letter from Luther L. Terry to C. Everett Koop Publication: Produced: 22 February 1982 Subject(s): United States Public Health ServicePolitics Archival Collection: The C. Everett Koop Papers (Profiles in Science)
3. Letter from Charles W. Gish, Indiana State Board of Health, Division of Dental Health to C. Everett Koop Publication: Produced: 8 December 1982 Subject(s): FluoridationUnited States Public Health Service Archival Collection: The C. Everett Koop Papers (Profiles in Science)
