Titles
- Letter from Joshua Lederberg to Albert B. Sabin4
- Letter from Joshua Lederberg to B. A. D. Stocker4
- Letter from Joshua Lederberg to Boris Rotman4
- Letter from Joshua Lederberg to Louis Dienes4
- Letter from Joshua Lederberg to M. L. Morse4
- Letter from Kiyoshi Kurahashi to Joshua Lederberg4
- Letter from Palmer David Skaar to Joshua Lederberg4
- Letter from Philip E. Hartman to Joshua Lederberg4
- Letter from Sol Spiegelman to Joshua Lederberg4
- Letter from Boris Ephrussi to Joshua Lederberg3
- Letter from Edouard Kellenberger to Joshua Lederberg3
- Letter from Edward L. Tatum to Joshua Lederberg3
- Letter from Ernest Borek to Joshua Lederberg3
- Letter from Francis Crick to Jerry Donohue3
- Letter from George Ivanovics to Joshua Lederberg3
- Letter from Giovanni Magni to Joshua Lederberg3
- Letter from Joshua Lederberg to Boris Ephrussi3
- Letter from Joshua Lederberg to Edouard Kellenberger3
- Letter from Joshua Lederberg to Francis J. Ryan3
- Letter from Joshua Lederberg to Frits and Ida Orskov3