Titles
- Letter from Bengt v. Hofsten to Joshua Lederberg1
- Letter from Bertram S. Brown to Joshua Lederberg1
- Letter from Boisfeuillet Jones to John E. Fogarty1
- Letter from Boisfeuillet Jones to Robert P. Clark1
- Letter from Carl Sagan to Edward Anders1
- Letter from Charles A. Evans to Joshua Lederberg1
- Letter from Charles R. Phillips to Edward Anders1
- Letter from Christian B. Anfinsen to Erwin Chargaff1
- Letter from Christian B. Anfinsen to James Watt1
- Letter from Clarence C. Cain to Joshua Lederberg1
- Letter from Clarence Dennis to John H. Peters1
- Letter from Clarence Dennis to Karl E. Karlson2
- Letter from Clarence Dennis to Margaret Blumenfeld1
- Letter from Colin S. Pittendrigh to Lloyd V. Berkner1
- Letter from Curt Stern to Joshua Lederberg1
- Letter from Daniel Mazia to Joshua Lederberg1
- Letter from David Ben-Dov, Embassy of Israel to Joshua Lederberg1
- Letter from Debi P. Burma, Bose Research Institute to Joshua Lederberg1
- Letter from Detlev Wulf Bronk to Joshua Lederberg1
- Letter from Don Flickinger to Joshua Lederberg2