51. 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)
52. Letter from Elof A. Carlson to Joshua Lederberg Publication: Produced: 23 April 1973 Subject(s): Transformation, GeneticGenetics Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
53. 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)
54. 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)
55. Letter from Harold Varmus and Stephen Hughes to Ed Southern, Medical Research Council of Great Britain Publication: Produced: 11 January 1978 Subject(s): Avian Sarcoma VirusesCloning, MolecularTransformation, Genetic Archival Collection: The Harold Varmus Papers (Profiles in Science)