- Letter from Federico Mayor, United Nations Educational, Scientific and Cultural Organization (UNESCO) to Joshua Lederberg2
- Letter from Gilbert H. Mudge to Joshua Lederberg2
- Letter from John A. Moore to Joshua Lederberg2
- Letter from John Cairns to Joshua Lederberg2
- Letter from Joshua Lederberg and William T. Golden, Carnegie Commission on Science, Technology & Government to Newt Gingrich, United States House of Representatives2
- Letter from Joshua Lederberg to Albert Rothenberg2
- Letter from Joshua Lederberg to Andre F. Marion, Applied Biosystems2
- Letter from Joshua Lederberg to Ann Cook Ganesan2
- Letter from Joshua Lederberg to Arthur C. Upton2
- Letter from Joshua Lederberg to Barton Childs2
- Letter from Joshua Lederberg to Bernard D. Davis2
- Letter from Joshua Lederberg to Brian T. Chait2
- Letter from Joshua Lederberg to Chris Davis2
- Letter from Joshua Lederberg to David J. Galas, United States Department of Energy2
- Letter from Joshua Lederberg to Federico Mayor, United Nations Educational, Scientific and Cultural Organization2
- Letter from Joshua Lederberg to Francis L. Black2
- Letter from Joshua Lederberg to Frederick R. Blattner2
- Letter from Joshua Lederberg to Jane Wales, National Security Council2
- Letter from Joshua Lederberg to Jared M. Diamond2
- Letter from Joshua Lederberg to John A. Moore2