1. Letter from Margaret Lieb to Joshua Lederberg Publication: Produced: 11 February 1949 Subject(s): Cell Culture TechniquesRecombination, Genetic Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. Letter from Joshua Lederberg to Margaret Lieb Publication: Produced: 14 February 1949 Subject(s): Recombination, GeneticMutationCell Culture Techniques Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
3. Letter from Joshua Lederberg to M. Demerec Publication: Produced: 17 February 1949 Subject(s): BacteriophagesCell Culture TechniquesRecombination, Genetic Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
4. Letter from Joshua Lederberg to Philip B. Cowles Publication: Produced: 2 June 1948 Subject(s): Bacillus PhagesCell Culture TechniquesRecombination, Genetic Archival Collection: The Joshua Lederberg Papers (Profiles in Science)