Titles
- Letter from Joshua Lederberg to Paul R. Burkholder6
- Letter from Joshua Lederberg to R. G. E. Murray6
- Letter from Joshua Lederberg to Raymond R. Roepke, American Cyanamid Company6
- Letter from Joshua Lederberg to Samuel J. Ajl6
- Letter from Joshua Lederberg to Seymour H. Hutner6
- Letter from Joshua Lederberg to Sol H. Goodgal6
- Letter from Joshua Lederberg to Stephen Juhasz6
- Letter from Joshua Lederberg to T. R. Hogness6
- Letter from Joshua Lederberg to Vernon Bryson6
- Letter from Joshua Lederberg to William D. McElroy6
- Letter from Joshua Lederberg to William Gorham6
- Letter from Joshua Lederberg to William O. Baker6
- Letter from Joshua Lederberg to William T. Golden6
- Letter from Lawrence Kolb to Lloyd H. Ziegler6
- Letter from Leonard Herzenberg to Joshua Lederberg6
- Letter from Sol Spiegelman to Jacques Monod6
- Letter from Taliaferro Clark to Lawrence Kolb6
- Letter from William Osler to Francis J. Shepherd [Transcript]6
- Letter from William Osler to J. George Adami [Transcript]6
- Medical recipe book6