Titles
- Letter from George W. Beadle to Joshua Lederberg44
- Letter from Salvador E. Luria to Joshua Lederberg43
- Letter from Joshua Lederberg to George Klein40
- Letter from Sol Spiegelman to Joshua Lederberg39
- Letter from Joshua Lederberg to Norton D. Zinder38
- Letter from Francis J. Ryan to Joshua Lederberg37
- Letter from Edward L. Tatum to Joshua Lederberg36
- Letter from Herman M. Kalckar to Joshua Lederberg35
- Letter from Joshua Lederberg to Sol Spiegelman35
- Letter from Norman H. Horowitz to Joshua Lederberg35
- Letter from Joshua Lederberg to Max Zelle33
- Letter from B. A. D. Stocker to Joshua Lederberg32
- Letter from Joshua Lederberg to James F. Crow31
- Letter from Max Zelle to Joshua Lederberg30
- Letter from Barton Childs to Joshua Lederberg29
- Letter from William Hayes to Joshua Lederberg29
- Letter from M. Demerec to Joshua Lederberg28
- Excerpt from Fred Soper's diary27
- Letter from John A. Moore to Joshua Lederberg27
- Letter from Joshua Lederberg to G. A. Derbyshire27