41. Letter from Joshua Lederberg to Ilda McVeigh Publication: Produced: 22 November 1948 Subject(s): Cell Culture TechniquesMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
42. Letter from Joshua Lederberg to Ralph Mellon Publication: Produced: 20 September 1950 Subject(s): Genetics, MicrobialMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
43. Letter from Joshua Lederberg to Gardner Middlebrook Publication: Produced: 7 April 1954 Subject(s): Drug Resistance, MicrobialMutationMycobacterium Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
44. Letter from Joshua Lederberg to Gardner Middlebrook Publication: Produced: 11 December 1956 Subject(s): Drug Resistance, MicrobialMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
45. Letter from Joshua Lederberg to C. Phillip Miller Publication: Produced: 5 December 1951 Subject(s): Escherichia coliMutationDrug Resistance, Microbial Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
46. Letter from Joshua Lederberg to M. Demerec Publication: Produced: 10 November 1949 Subject(s): Genetics, MicrobialMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
47. Letter from Joshua Lederberg to Mary B. Mitchell Publication: Produced: 22 October 1954 Subject(s): Cell Culture TechniquesYeastsMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
48. Letter from Joshua Lederberg to Mario U. Dianzani Publication: Produced: 9 January 1951 Subject(s): Escherichia coliMutationResearch Design Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
49. Letter from Joshua Lederberg to Edna Montgomery Publication: Produced: 25 March 1948 Subject(s): Equipment and SuppliesGenetics, MicrobialMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
50. Letter from Joshua Lederberg to Edna Montgomery Publication: Produced: 24 September 1949 Subject(s): Research DesignMutationIsomaltose Archival Collection: The Joshua Lederberg Papers (Profiles in Science)