1. Letter from Joshua Lederberg to Ralph G. Meader Creator: Lederberg, Joshua Date: 20 November 1947 Genre: Letters (correspondence)
2. Letter from Joshua Lederberg to Melvin Cohn Creator: Lederberg, Joshua Date: 22 March 1952 Genre: Letters (correspondence)
3. Letter from Joshua Lederberg to Seymour S. Cohen Creator: Lederberg, Joshua Date: 21 June 1949 Genre: Letters (correspondence)
4. Letter from Joshua Lederberg to David M. Bonner Creator: Lederberg, Joshua Date: 12 June 1950 Genre: Letters (correspondence)
5. Letter from Joshua Lederberg to David M. Bonner Creator: Lederberg, Joshua Date: 13 October 1951 Genre: Letters (correspondence)
6. Letter from Samuel J. Ajl to Joshua Lederberg Creator: Ajl, Samuel J., 1923- Date: 21 September 1949 Genre: Letters (correspondence)
7. Letter from Joshua Lederberg to Gordon Allen Creator: Lederberg, Joshua Date: 23 January 1950 Genre: Letters (correspondence)
8. Letter from Joshua Lederberg to Gordon Allen Creator: Lederberg, Joshua Date: 19 May 1950 Genre: Letters (correspondence)
9. Letter from Joshua Lederberg to Gordon Allen Creator: Lederberg, Joshua Date: 20 March 1950 Genre: Letters (correspondence)
10. Letter from Joshua Lederberg to Gordon Allen Creator: Lederberg, Joshua Date: 6 January 1950 Genre: Letters (correspondence)