1. Letter from Joshua Lederberg to Barbara McClintock Publication: Produced: 12 November 1948 Subject(s): Crossing Over, Genetic Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. 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)