1. Letter from Joshua Lederberg to C. H. Browning Publication: Produced: 31 July 1950 Subject(s): MutagenesisRecombination, Genetic Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. Letter from Joshua Lederberg to C. H. Browning Publication: Produced: 22 January 1951 Subject(s): Cell Culture TechniquesRecombination, Genetic Archival Collection: The Joshua Lederberg Papers (Profiles in Science)