Titles
- Letter from John H. Northrop to Joshua Lederberg5
- Letter from Joseph Fletcher to Joshua Lederberg5
- Letter from Joseph S. Gots to Joshua Lederberg5
- Letter from Joshua Lederberg to A. T. Ganesan5
- Letter from Joshua Lederberg to Albert P. Krueger5
- Letter from Joshua Lederberg to Alice Moran5
- Letter from Joshua Lederberg to Alvin M. Weinberg5
- Letter from Joshua Lederberg to Arnold W. Ravin5
- Letter from Joshua Lederberg to C. Phillip Miller5
- Letter from Joshua Lederberg to Charles C. Brinton, Jr.5
- Letter from Joshua Lederberg to David A. Hamburg5
- Letter from Joshua Lederberg to David L. Nanney5
- Letter from Joshua Lederberg to David Rittenberg5
- Letter from Joshua Lederberg to Edward I. Koch5
- Letter from Joshua Lederberg to Edward L. Ginzton5
- Letter from Joshua Lederberg to Einar Leifson5
- Letter from Joshua Lederberg to Elizabeth S. (Tibby) Russell5
- Letter from Joshua Lederberg to Frank H. T. Rhodes5
- Letter from Joshua Lederberg to Guido Pontecorvo5
- Letter from Joshua Lederberg to Gunther S. Stent5