41. Letter from Michael Doudoroff to Joshua Lederberg Publication: Produced: 20 April 1949 Subject(s): Cell Culture TechniquesResearch Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
42. Letter from Herman C. Lichstein to Joshua Lederberg Publication: Produced: undated Subject(s): Cell Culture TechniquesGenetics, Microbial Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
43. Letter from Margaret Lieb to Joshua Lederberg Publication: Produced: 11 February 1949 Subject(s): Cell Culture TechniquesRecombination, Genetic Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
44. Letter from Joshua Lederberg to Margaret Lieb Publication: Produced: 14 February 1949 Subject(s): Recombination, GeneticMutationCell Culture Techniques Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
45. Letter from Joshua Lederberg to Kaare Lilleengen Publication: Produced: 11 October 1949 Subject(s): BacteriophagesCell Culture Techniques Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
46. Letter from Joshua Lederberg to Kaare Lilleengen Publication: Produced: 6 February 1950 Subject(s): Cell Culture Techniques Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
47. Telegram from the Swedish Consulate General to Joshua Lederberg Publication: Produced: 4 February 1950 Subject(s): Cell Culture Techniques Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
48. Letter from Joshua Lederberg to Gerry Lindegren Publication: Produced: 29 July 1946 Subject(s): Cell Culture TechniquesGenesMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
49. Letter from Joshua Lederberg to Edward L. Tatum Publication: Produced: 19 September 1945 Subject(s): Cell Culture TechniquesEscherichia coliGenetics, Microbial Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
50. Letter from Joshua Lederberg to C. C. Lindegren Publication: Produced: 27 December 1953 Subject(s): Cell Culture Techniques Archival Collection: The Joshua Lederberg Papers (Profiles in Science)