- Letter from Herschel Roman to Joshua Lederberg1
- Letter from Howard C. Filston, Duke University Medical Center to C. Everett Koop1
- Letter from I. Bernard Cohen to Joshua Lederberg1
- Letter from Industrial Research & Development to Joshua Lederberg1
- Letter from J. Michael Bishop and Harold Varmus to Harry D. Williams II, American Business Cancer Research Foundation1
- Letter from J. Michael Bishop to colleagues at the UCSF School of Medicine1
- Letter from James A. O'Neill, Jr., Children's Hospital of Philadelphia to C. Everett Koop1
- Letter from James D. Ebert, Carnegie Institution of Washington to Barbara McClintock1
- Letter from John R. Thomas to Joshua Lederberg1
- Letter from Julianne A. Simpson, Bellingham & Whatcom County District Department of Public Health. Community Health Center to C. Everett Koop1
- Letter from Julius Axelrod, Christian B. Anfinsen, Marshall W. Nirenberg, and D. Carleton Gajdusek to J. Peter Grace1
- Letter from Karen L. Scott, Cook County Department of Public Health to C. Everett Koop1
- Letter from Lawrence M. Gartner, Wyler Children's Hospital to Margaret Heckler, United States Department of Health and Human Services1
- Letter from Leonard A. Cole to Joshua Lederberg1
- Letter from M. J. Rossant, Twentieth Century Fund to Joshua Lederberg1
- Letter from Margery W. Shaw, Institute for the Interprofessional Study of Health Law to Joshua Lederberg1
- Letter from Mark Kac, Joel Lebowitz, and Paul Plotz to Marshall W. Nirenberg1
- Letter from Maxine Singer to Rabbi Eugene Lipman1
- Letter from Mrs. William B. Miley Jr.[Cedelia B. Miley] to C. Everett Koop1
- Letter from Neil Bartlett to Joshua Lederberg1