1. Letter from Joshua Lederberg to P. R. Edwards Publication: Produced: 13 June 1950 Subject(s): Cell Culture TechniquesRecombination, GeneticSerology Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. Letter from Joshua Lederberg to P. R. Edwards Publication: Produced: 21 June 1950 Subject(s): Cell Culture Techniques Archival Collection: The Joshua Lederberg Papers (Profiles in Science)