1. Letter from Francis Crick to Alexander Rich Publication: Produced: 4 September 1974 Subject(s): RNA, TransferEthics, Professional Archival Collection: The Francis Crick Papers (Profiles in Science)
2. Letter from Francis Crick to Alexander Rich Publication: Produced: 22 October 1974 Subject(s): RNA, TransferEthics, Professional Archival Collection: The Francis Crick Papers (Profiles in Science)