1. Letter from Luca Cavalli-Sforza to Joshua Lederberg Publication: Produced: 9 September 1980 Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. Letter from Luca Cavalli-Sforza to Joshua Lederberg Publication: Produced: 22 January 1980 Archival Collection: The Joshua Lederberg Papers (Profiles in Science)