21. Letter from Joshua Lederberg to Michael Doudoroff Publication: Produced: 28 April 1950 Subject(s): Genetics, MicrobialMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
22. Letter from Joshua Lederberg to D. Lewis Publication: Produced: 8 November 1948 Subject(s): EnzymesMutationGenetics Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
23. Letter from Joshua Lederberg to D. Lewis Publication: Produced: 27 June 1951 Subject(s): Genes, PlantMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
24. Letter from Joshua Lederberg to Herman C. Lichstein Publication: Produced: 12 February 1955 Subject(s): FermentationMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
25. 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)
26. Letter from Joshua Lederberg to Michael Doudoroff Publication: Produced: 9 March 1948 Subject(s): Escherichia coliGenetics, MicrobialMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
27. 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)
28. Letter from Joshua Lederberg to C. C. Lindegren Publication: Produced: 1 September 1946 Subject(s): MutationRecombination, Genetic Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
29. Letter from Joshua Lederberg to Michael Doudoroff Publication: Produced: 20 October 1948 Subject(s): Genetics, MicrobialMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
30. Letter from Joshua Lederberg to Michael Doudoroff Publication: Produced: 16 July 1948 Subject(s): Cell Culture TechniquesEscherichia coliMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)