Titles
- Letter from Alexander Rich to Francis Crick6
- Letter from Bruno B. Rossi to Joshua Lederberg6
- Letter from Carl Sagan to Joshua Lederberg6
- Letter from Clifford Grobstein to Joshua Lederberg6
- Letter from David M. Mumford to Joshua Lederberg6
- Letter from David Rittenberg to Joshua Lederberg6
- Letter from Derrick Rowley to Joshua Lederberg6
- Letter from Edouard Kellenberger to Joshua Lederberg6
- Letter from Edward E. David, Jr. to Joshua Lederberg6
- Letter from Eileen Rockefeller to Joshua Lederberg6
- Letter from Ernst Friedheim to Joshua Lederberg6
- Letter from Francis Crick to Jerry Donohue6
- Letter from Frank H. T. Rhodes to Joshua Lederberg6
- Letter from Frits Orskov to Joshua Lederberg6
- Letter from H. J. Muller to Joshua Lederberg6
- Letter from Harold C. Urey to Joshua Lederberg6
- Letter from Herman M. Kalckar to Joshua and Esther Lederberg6
- Letter from Howard M. Cann to Joshua Lederberg6
- Letter from Irvine H. Page to Joshua Lederberg6
- Letter from Jean Weigle to Joshua Lederberg6