21. Letter from Joshua Lederberg to C. C. Lindegren Publication: Produced: 28 July 1954 Subject(s): Transformation, GeneticResearch Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
22. Letter from Joshua Lederberg to Jacques Monod Publication: Produced: 21 March 1949 Subject(s): Genetics, MicrobialMutationTransformation, GeneticResearch Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
23. Letter from Joshua Lederberg to Bernard D. Davis Publication: Produced: 17 April 1950 Subject(s): Transformation, Genetic Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
24. Letter from Charles J. Sherr, National Institutes of Health to Harold Varmus and J. Michael Bishop Publication: Produced: 21 April 1983 Subject(s): Transformation, GeneticPolyproteins Archival Collection: The Harold Varmus Papers (Profiles in Science)