1. Letter from Joshua Lederberg to Einar Leifson Publication: Produced: 8 September 1955 Subject(s): Cell Culture TechniquesResearch Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. Letter from Joshua Lederberg to Einar Leifson Publication: Produced: 11 September 1955 Subject(s): Cell Culture TechniquesFlagellaResearch Archival Collection: The Joshua Lederberg Papers (Profiles in Science)