1. Letter from Luca Cavalli-Sforza to Joshua Lederberg Publication: Produced: 1 October 1986 Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. Letter from Luca Cavalli-Sforza to Joshua Lederberg Publication: Produced: November 1986 Archival Collection: The Joshua Lederberg Papers (Profiles in Science)