Titles
- Letter from Joshua Lederberg to Bruno B. Rossi4
- Letter from Joshua Lederberg to Luca Cavalli-Sforza4
- Letter from Karl Paul Link to Joshua Lederberg4
- Letter from Melvin Calvin to Joshua Lederberg4
- Letter from Olavi Makela to Joshua Lederberg4
- Letter from Ruggero Ceppellini to Joshua Lederberg4
- Letter from W. W. Wilkerson to John E. Fogarty4
- Letter from Boris Rotman to Joshua Lederberg3
- Letter from Charles A. Evans to Joshua Lederberg3
- Letter from Felix Haurowitz to Joshua Lederberg3
- Letter from Francis Crick to Joshua Lederberg3
- Letter from G. A. Derbyshire to Joshua Lederberg3
- Letter from George W. Beadle to Joshua Lederberg3
- Letter from Hubert H. Humphrey to Joshua Lederberg3
- Letter from J. R. Heller to John E. Fogarty3
- Letter from Jerome J. Suran to Adrian Kantrowitz3
- Letter from John E. Pfeiffer to Joshua Lederberg3
- Letter from Joshua Lederberg to Aaron Novick3
- Letter from Joshua Lederberg to Charles C. Brinton, Jr.3
- Letter from Joshua Lederberg to Igor Y. Tamm, Lebedev's Institute for Physical Research3