- Letter from Edward J. Gerrity, International Telephone & Telegraph Corporation (ITT) to Joshua Lederberg1
- Letter from Eileen Rockefeller to Joshua Lederberg1
- Letter from Ezra Lozinski to Joshua Lederberg1
- Letter from Farrington Daniels, Jr. to Joshua Lederberg1
- Letter from Francis Crick to Tomaso Poggio1
- Letter from Frank E. Young to Joshua Lederberg1
- Letter from Frank Press to Joshua Lederberg1
- Letter from Fred Jerome, Scientists' Institute for Public Information to Joshua Lederberg1
- Letter from Fred T. Schultz, Nicholas Turkey Breeding Farms, Inc. to Joshua Lederberg1
- Letter from Fred T. Schultz, Nicholas Turkey Breeding Farms, Inc. to Ronald Cape1
- Letter from Frederick C. Robbins, Institute of Medicine to Joshua Lederberg1
- Letter from Frederick Seitz to Joshua Lederberg2
- Letter from George B. Brown to Joshua Lederberg1
- Letter from George B. Kistiakowsky, Council for a Livable World to Joshua Lederberg1
- Letter from George C. McGhee, Resources for the Future to Joshua Lederberg1
- Letter from George G. Somjen to Joshua Lederberg1
- Letter from George J. Cardinale, Roche Institute of Molecular Biology to Joshua Lederberg1
- Letter from George W. Beadle to Barbara McClintock1
- Letter from Gerald Freund, MacArthur Foundation to Joshua Lederberg1
- Letter from Glenn A. Rice and Roger D. Clark to Joshua Lederberg1