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)
3. Aberrant Heterozygotes In Escherichia coli Publication: National Academy of Sciences (U.S.), April 1949 Subject(s): Recombination, GeneticEscherichia coli Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
4. Sibling Recombinants in Zygote Pedigrees of Escherichia coli Publication: National Academy of Sciences (U.S.), December 1957 Subject(s): Recombination, GeneticCrossing Over, GeneticEscherichia coli Archival Collection: The Joshua Lederberg Papers (Profiles in Science)