31. Letter from Salvador E. Luria to Joshua Lederberg Creator: Luria, S. E. (Salvador Edward), 1912-1991 Date: 12 December 1947 Genre: Letters (correspondence)
32. Letter from Joshua Lederberg to Salvador E. Luria Creator: Lederberg, Joshua Date: 27 January 1949 Genre: Letters (correspondence)
33. Letter from Joshua Lederberg to Ellis Englesberg Creator: Lederberg, Joshua Date: 12 January 1950 Genre: Letters (correspondence)
34. Letter from Robert J. Mandle to Joshua Lederberg Creator: Mandle, Robert J. Date: 17 June 1949 Genre: Letters (correspondence)
35. Letter from Joshua Lederberg to Kenneth Mather Creator: Lederberg, Joshua Date: 16 May 1947 Genre: Letters (correspondence)
36. Letter from Joshua Lederberg to Ilda McVeigh Creator: Lederberg, Joshua Date: 22 November 1948 Genre: Letters (correspondence)
37. Letter from Ralph Mellon to Joshua Lederberg Creator: Western Pennsylvania HospitalMellon, Ralph R. (Ralph Robertson), 1883- Date: 7 August 1950 Genre: Letters (correspondence)
38. Letter from Joshua Lederberg to Mario U. Dianzani Creator: Lederberg, Joshua Date: 9 January 1951 Genre: Letters (correspondence)
39. Letter from Joshua Lederberg to Edna Montgomery Creator: Lederberg, Joshua Date: 25 March 1948 Genre: Letters (correspondence)
40. Letter from C. C. Lindegren to Joshua Lederberg Creator: Lindegren, Carl C. (Carl Clarence), 1896-1986 Date: 21 August 1946 Genre: Letters (correspondence)