Titles
- Letter from C. E. Clifton to Joshua Lederberg3
- Letter from Caroline Raut to Joshua Lederberg3
- Letter from Cass Canfield to Joshua Lederberg3
- Letter from Claude Forkner to Florence R. Sabin3
- Letter from Clive C. Spicer to Joshua and Esther Lederberg3
- Letter from Columbia University to Joshua Lederberg3
- Letter from Cy Levinthal to Joshua Lederberg3
- Letter from D. H. L. Bishop to Sol Spiegelman3
- Letter from D. Lewis to Joshua Lederberg3
- Letter from Daniel Bavly, Association for Peace to Joshua Lederberg3
- Letter from Daniel L. Hartl to Joshua Lederberg3
- Letter from Daniel Nathans to David C. Ward3
- Letter from Daniel Nathans to Paul Berg3
- Letter from David C. Ward to Daniel Nathans3
- Letter from David J. Galas, United States Department of Energy to Joshua Lederberg3
- Letter from David M. Bonner to Edward L. Tatum3
- Letter from David Perlman to Joshua Lederberg3
- Letter from Davis B. Bobrow to Joshua Lederberg3
- Letter from Dean B. Cowie to Joshua Lederberg3
- Letter from Dean Fraser to Joshua Lederberg3