Titles
- Letter from Jean Weigle to Joshua Lederberg3
- Letter from Joseph Lein to Joshua Lederberg3
- Letter from Joshua Lederberg to Boris Rotman3
- Letter from Joshua Lederberg to Dennis Flanagan, Scientific American3
- Letter from Joshua Lederberg to Francis J. Ryan3
- Letter from Joshua Lederberg to Frank Fenner3
- Letter from Joshua Lederberg to Hugh L. Dryden, National Academy of Sciences3
- Letter from Joshua Lederberg to John Z. Bowers3
- Letter from Joshua Lederberg to K. V. Kossikov3
- Letter from Joshua Lederberg to M. Demerec3
- Letter from Joshua Lederberg to M. R. Irwin3
- Letter from Joshua Lederberg to Norton D. Zinder3
- Letter from Joshua Lederberg to O. H. Frankel3
- Letter from Joshua Lederberg to Sol H. Goodgal3
- Letter from Joshua Lederberg to Victor Twitty3
- Letter from Joshua Lederberg to William Hayes3
- Letter from Joshua Lederberg to Yukinori Hirota3
- Letter from Kenneth V. Thimann to Joshua Lederberg3
- Letter from Norton D. Zinder to Joshua Lederberg3
- Letter from Otis L. Anderson to John E. Fogarty3