Titles
- Letter from Joshua Lederberg to Henry S. Kaplan5
- Letter from Joshua Lederberg to James A. Jenkins5
- Letter from Joshua Lederberg to Pierre Fredericq5
- Letter from Pierre Fredericq to Joshua Lederberg5
- Letter from Robert H. Alway to Joshua Lederberg5
- Letter from Aaron Novick to Joshua Lederberg4
- Letter from Boris Ephrussi to Joshua Lederberg4
- Letter from Frits and Ida Orskov to Joshua and Esther Lederberg4
- Letter from Harry Eagle to Joshua Lederberg4
- Letter from Hilary Koprowski to Joshua Lederberg4
- Letter from James A. Jenkins to Joshua Lederberg4
- Letter from Joshua Lederberg to C. A. Elvehjem4
- Letter from Joshua Lederberg to Harry Eagle4
- Letter from Joshua Lederberg to Lloyd V. Berkner4
- Letter from Joshua Lederberg to N. Avrion Mitchison4
- Letter from Joshua Lederberg to S. Gaylen Bradley4
- Letter from P. R. Edwards to Joshua Lederberg4
- Letter from Ruth T. Gross to Joshua Lederberg4
- Letter from Sidney Raffel to Joshua Lederberg4
- Postcard from Karl Paul Link to Joshua Lederberg4