121. Letter from Joshua Lederberg to Luca Cavalli-Sforza Publication: Produced: 30 September 1965 Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
122. Letter from Joshua Lederberg to Luca Cavalli-Sforza Publication: Produced: 6 June 1968 Archival Collection: The Joshua Lederberg Papers (Profiles in Science)