11. Letter from Joshua Lederberg to Ralph G. Meader Publication: Produced: 20 November 1947 Subject(s): Escherichia coliMutationTransformation, Genetic Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
12. Letter from Joshua Lederberg to Pierre Fredericq Publication: Produced: 11 October 1950 Subject(s): BacteriophagesEscherichia coli Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
13. Letter from Joshua Lederberg to H. J. Conn Publication: Produced: 1 July 1949 Subject(s): Culture MediaEscherichia coli Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
14. Letter from Joshua Lederberg to C. E. Connor Publication: Produced: 9 November 1947 Subject(s): Escherichia coli Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
15. Letter from Joshua Lederberg to R. S. Benham Publication: Produced: 16 February 1951 Subject(s): Cell Culture TechniquesEscherichia coliRecombination, Genetic Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
16. Letter from Joshua Lederberg to Kenneth A. Bisset Publication: Produced: 10 July 1951 Subject(s): Escherichia coliGenetics Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
17. Letter from Joshua Lederberg to Pierre Fredericq Publication: Produced: 30 October 1950 Subject(s): Cell Culture TechniquesEscherichia coli Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
18. Letter from Joshua Lederberg to David M. Bonner Publication: Produced: 1950 Subject(s): Cell Culture TechniquesEscherichia coli Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
19. Letter from Joshua Lederberg to Pierre Fredericq Publication: Produced: 21 November 1950 Subject(s): Cell Culture TechniquesEscherichia coli Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
20. Letter from David M. Bonner to Joshua Lederberg Publication: Produced: 23 November 1949 Subject(s): Escherichia coliResearchSerology Archival Collection: The Joshua Lederberg Papers (Profiles in Science)