1. Letter from Luca Cavalli-Sforza to Joshua Lederberg Publication: Produced: 16 December 1951 Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. Letter from Luca Cavalli-Sforza to Joshua Lederberg Publication: Produced: 3 May 1951 Archival Collection: The Joshua Lederberg Papers (Profiles in Science)