1. Postcard from Alba Cavalli-Sforza to Joshua and Esther Lederberg Publication: Produced: 20 May 1958 Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
2. Postcard from Alba Cavalli-Sforza to Joshua and Esther Lederberg Publication: Produced: 13 September 1958 Archival Collection: The Joshua Lederberg Papers (Profiles in Science)