Titles
- Letter from Joshua Lederberg to Victor Klee4
- Letter from Joshua Lederberg to Victor Twitty4
- Letter from Joshua Lederberg to W. Gordon Whaley4
- Letter from Joshua Lederberg to W. J. Halliday4
- Letter from Joshua Lederberg to Walter F. Bodmer4
- Letter from Joshua Lederberg to Warren Weaver4
- Letter from Joshua Lederberg to Wayne C. Jaeschke4
- Letter from Joshua Lederberg to Wayne Umbreit, Merck Institute for Therapeutic Research4
- Letter from Joshua Lederberg to Wilbur J. Cohen4
- Letter from Joshua Lederberg to William F. Raub4
- Letter from Joshua Lederberg to the National Research Council4
- Letter from Joshua Lederberg to the San Francisco Chronicle4
- Letter from Julien E. Mack to Joshua Lederberg4
- Letter from K. P. Wood to Joshua Lederberg4
- Letter from Kai O. Pedersen to Michael Heidelberger4
- Letter from Karl E. Karlson to Clarence Dennis4
- Letter from Kenneth W. Cooper to Joshua Lederberg4
- Letter from Kiyoshi Kurahashi to Joshua Lederberg4
- Letter from Lawrence Kolb to the Surgeon General4
- Letter from Leonard M. Elstad to John E. Fogarty4