1. Letter from Joshua Lederberg to Pierre Fredericq Publication: Produced: 11 October 1950 Subject(s): BacteriophagesEscherichia coli Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. Letter from Joshua Lederberg to Pierre Fredericq Publication: Produced: 30 October 1950 Subject(s): Cell Culture TechniquesEscherichia coli Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
3. Letter from Joshua Lederberg to Pierre Fredericq Publication: Produced: 21 November 1950 Subject(s): Cell Culture TechniquesEscherichia coli Archival Collection: The Joshua Lederberg Papers (Profiles in Science)