1. 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)
2. Letter from Joshua Lederberg to H. J. Muller Publication: Produced: 19 August 1956 Subject(s): Recombination, GeneticEscherichia coliMutationResearch Archival Collection: The Joshua Lederberg Papers (Profiles in Science)