1. Letter from Ernest Winocour to Daniel Nathans Publication: Produced: 23 July 1969 Subject(s): Simian virus 40RNANucleic Acid Hybridization Archival Collection: The Daniel Nathans Papers (Profiles in Science)
2. Letter from Maxine Singer to James J. Castles Publication: Produced: 9 June 1966 Subject(s): Nucleic Acid HybridizationRNA, Transfer Archival Collection: The Maxine Singer Papers (Profiles in Science)
