11. Letter from Joshua Lederberg to H. J. Muller Publication: Produced: 19 September 1949 Subject(s): Genetics, Microbial Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
12. Letter from Joshua Lederberg to Bernard D. Davis Publication: Produced: 31 October 1949 Subject(s): Cell Culture TechniquesGenetics, MicrobialTeaching Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
13. Letter from Joshua Lederberg to Bernard D. Davis Publication: Produced: 14 May 1949 Subject(s): Genetics, MicrobialMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)