1. Letter from Joshua Lederberg to David M. Bonner Publication: Produced: 18 November 1949 Subject(s): Cell Culture TechniquesResearch Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. Letter from Michael Doudoroff to Joshua Lederberg Publication: Produced: 20 April 1949 Subject(s): Cell Culture TechniquesResearch Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
3. Letter from Joshua Lederberg to Anna Dean Dulaney Publication: Produced: 12 January 1949 Subject(s): Cell Culture TechniquesCarbohydratesResearch Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
4. Letter from Joshua Lederberg to I. D. Michelson Publication: Produced: 4 October 1949 Subject(s): Cell Culture TechniquesResearch Archival Collection: The Joshua Lederberg Papers (Profiles in Science)