31. Letter from Joshua Lederberg to Kenneth Mather Creator: Lederberg, Joshua Date: 29 August 1947 Genre: Letters (correspondence)
32. Letter from Ralph Mellon, Western Pennsylvania Hospital to Joshua Lederberg Creator: Western Pennsylvania HospitalMellon, Ralph R. (Ralph Robertson), 1883- Date: 11 December 1946 Genre: Letters (correspondence)
33. Letter from Joshua Lederberg to Max Delbruck Creator: Lederberg, Joshua Date: 30 September 1952 Genre: Letters (correspondence)
34. Letter from Robert Paul Levine to Joshua Lederberg Creator: Levine, Robert Paul Date: 5 January 1952 Genre: Letters (correspondence)
35. Letter from Joshua Lederberg to Margaret Lieb Creator: Lederberg, Joshua Date: 22 November 1948 Genre: Letters (correspondence)
36. Letter from Margaret Lieb to Joshua Lederberg Creator: Lieb, Margaret Date: 11 February 1949 Genre: Letters (correspondence)
37. Letter from Joshua Lederberg to John Loutit Creator: Lederberg, Joshua Date: 11 February 1952 Genre: Letters (correspondence)
38. Letter from Salvador E. Luria to Joshua Lederberg Creator: Luria, S. E. (Salvador Edward), 1912-1991 Date: 17 July 1946 Genre: Letters (correspondence)
39. Letter from Joshua Lederberg to Salvador E. Luria Creator: Lederberg, Joshua Date: 4 June 1948 Genre: Letters (correspondence)
40. Genetic Recombination in Bacteria: A Discovery Account Creator: Lederberg, Joshua Date: 1987 Publisher: Annual Reviews, Inc. Genre: Articles