1. Letter from Joshua Lederberg to Cy Levinthal Publication: Produced: 13 September 1972 Subject(s): Recombination, GeneticHistory of MedicineArchives Archival Collection: The Oswald T. Avery Collection (Profiles in Science)
2. Letter from Joshua Lederberg to Carolyn Kopp, Rockefeller University Archives Publication: Produced: 28 September 1983 Subject(s): ArchivesHistory of MedicineHistory, 20th Century Archival Collection: The Joshua Lederberg Papers (Profiles in Science)