Titles
- Letter from Henry P. Treffers to Joshua Lederberg3
- Letter from Henry Platt to Joshua Lederberg3
- Letter from Henry Swan to Clarabell Presley3
- Letter from Henry Swan to his father3
- Letter from Herbert B. Pahl to United States. Regional Medical Programs Service and United States. Department of Health, Education, and Welfare3
- Letter from Herschel Roman, Annual Review of Genetics to Joshua Lederberg3
- Letter from Hewson Swift to Joshua Lederberg3
- Letter from Hideo Nakayama to Joshua Lederberg3
- Letter from Hilary Koprowski to Joshua and Esther Lederberg3
- Letter from Hugh Cumming to Lawrence Kolb3
- Letter from I. C. Gunsalus to Joshua Lederberg3
- Letter from Ingrith Deyrup to Joshua Lederberg3
- Letter from Irwin M. Arias to Joshua Lederberg3
- Letter from Isabelle Havens to Joshua Lederberg3
- Letter from Isac Halbrecht to Joshua Lederberg3
- Letter from Israel Halperin to Marshall W. Nirenberg3
- Letter from Ivan L. Bennett, Jr. to Joshua Lederberg3
- Letter from J. Dubnoff to Joshua Lederberg3
- Letter from J. L. Howatt to Joshua Lederberg3
- Letter from J. Oliver Lampen, American Cyanamid Company to Joshua Lederberg3