Titles
- Letter from Joshua Lederberg to Richard S. Young2
- Letter from Joshua Lederberg to Russel V. Lee2
- Letter from Joshua Lederberg to Samuel J. Ajl2
- Letter from Joshua Lederberg to Yehuda Elkana2
- Letter from Norman Sartorius, World Health Organization to Joshua Lederberg2
- Letter from Otto Westphal to Joshua Lederberg2
- Letter from Paul Berg to Daniel Nathans2
- Letter from Tracy M. Sonneborn to Joshua Lederberg2
- Letter from Yukinori Hirota to Joshua Lederberg2
- Letter from Z. Lorkiewicz to Hela Bursztyn-Pettegrew2
- Letter from Aaron Klug to Philip Siekevitz1
- Letter from Alan McGowan, Scientists' Institute for Public Information to Burke K. Zimmerman, Environmental Defense Fund, Inc.1
- Letter from Alfred Kastler to Marshall W. Nirenberg1
- Letter from Allan M. Campbell to Joshua Lederberg1
- Letter from Andre Lwoff to Joshua Lederberg1
- Letter from Avram Goldstein to Joshua Lederberg1
- Letter from Bernard Schoenberg, Man and Medicine to Joshua Lederberg1
- Letter from Bruce N. Ames to Joshua Lederberg1
- Letter from Burke K. Zimmerman, Environmental Defense Fund to David Mathews, Department of Health, Education, and Welfare1
- Letter from Carl Djerassi to A. G. Gonzalez1