Titles
- Letter from Joshua Lederberg to John V. Tunney4
- Letter from Joshua Lederberg to Joseph C. Hinsey4
- Letter from Joshua Lederberg to Joseph S. Gots4
- Letter from Joshua Lederberg to K. V. Kossikov4
- Letter from Joshua Lederberg to Karl Paul Link4
- Letter from Joshua Lederberg to Kendall W. King4
- Letter from Joshua Lederberg to Kenneth A. Bisset4
- Letter from Joshua Lederberg to Kenneth J. Arrow4
- Letter from Joshua Lederberg to Kimball and Barbara Atwood4
- Letter from Joshua Lederberg to Laurance S. Rockefeller4
- Letter from Joshua Lederberg to Leland W. Parr4
- Letter from Joshua Lederberg to Lois Larkin4
- Letter from Joshua Lederberg to M. C. Winternitz4
- Letter from Joshua Lederberg to Margery W. Shaw4
- Letter from Joshua Lederberg to Marguerite Vogt4
- Letter from Joshua Lederberg to Marjorie Bohnhoff4
- Letter from Joshua Lederberg to McGeorge Bundy4
- Letter from Joshua Lederberg to Nils Fries4
- Letter from Joshua Lederberg to Orr Reynolds4
- Letter from Joshua Lederberg to Orville G. Brim, Jr., Russell Sage Foundation4