Titles
- Letter from Edwin C. Whitehead to Marshall W. Nirenberg1
- Letter from Elie A. Shneour to Joshua Lederberg1
- Letter from Eliot Stellar to Marshall W. Nirenberg1
- Letter from F. Gilbert McMahon to Edward D. Freis1
- Letter from Frank A. Finnerty, Jr. to Edward D. Freis1
- Letter from Frank Press, National Academy of Sciences to Joshua Lederberg1
- Letter from Fred C. Ikle to Joshua Lederberg1
- Letter from Garland E. Allen to Joshua Lederberg1
- Letter from Gary B. MacDonald, AIDS Action Council to C. Everett Koop1
- Letter from George Wald to Joshua Lederberg1
- Letter from Georgetown University Department of Biology to Marshall W. Nirenberg1
- Letter from Gil Gerald, National Coalition of Black Lesbians and Gays to C. Everett Koop1
- Letter from Gordon C. F. Bearn to Joshua Lederberg1
- Letter from Graham Allison to Joshua Lederberg1
- Letter from Guido Pontecorvo to Joshua Lederberg1
- Letter from H. Branch Howe, Jr. to Joshua Lederberg1
- Letter from Harold Varmus to James D. Watson, Cold Spring Harbor Laboratory1
- Letter from Harold Varmus to Jon Beckwith, Department of Microbiology and Molecular Genetics, Harvard Medical School1
- Letter from Herbert Nagourney, Comtex Scientific Corporation to Joshua Lederberg1
- Letter from Irvine H. Page to Edward D. Freis1