Titles
- Letter from Robert H. Ebert, Milbank Memorial Fund to Joshua Lederberg4
- Letter from Robley Williams to Rosalind Franklin4
- Letter from Rodman C. Rockefeller to Joshua Lederberg4
- Letter from Rodney W. Nichols to Alexander D. Forger4
- Letter from Roger M. Herriott to Joshua Lederberg4
- Letter from Roger S. Greene to Alan Gregg4
- Letter from Rosalind Franklin to F. C. Bawden4
- Letter from Rosalind Franklin to Robley Williams4
- Letter from Ruth T. Gross to Joshua Lederberg4
- Letter from Salvador E. Luria to Jacques Monod4
- Letter from Sarah Sarid, Weizmann Institute of Science to Joshua Lederberg4
- Letter from Seymour Kety to Joshua Lederberg4
- Letter from Seymour Pomper to Joshua Lederberg4
- Letter from Sol Spiegelman to Francis Crick4
- Letter from Sydney Brenner to Joshua Lederberg4
- Letter from Sylvia Frank to Joshua Lederberg4
- Letter from Theodore Cooper, Cornell University Medical College to Joshua Lederberg4
- Letter from Theodore T. Puck to Joshua Lederberg4
- Letter from Thomas H. Kuchel to Joshua Lederberg4
- Letter from Unknown to Joshua Lederberg4