1. Letter from Joshua Lederberg to Gerry Lindegren Publication: Produced: 29 July 1946 Subject(s): Cell Culture TechniquesGenesMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. Letter from I. D. Michelson to Joshua Lederberg Publication: Produced: 26 January 1949 Subject(s): Cell Culture TechniquesGenesMutation Archival Collection: The Joshua Lederberg Papers (Profiles in Science)