1. Open Letter to the Asilomar Conference on Hazards of Recombinant DNA Publication: Produced: [February 1975] Subject(s): DNA, RecombinantCongresses as TopicHazardous SubstancesGuidelines as Topic Archival Collection: The Maxine Singer Papers (Profiles in Science)
2. Letter from Roy J. Britten to the National Academy of Sciences Publication: Produced: 11 April 1973 Archival Collection: The Joshua Lederberg Papers (Profiles in Science)
