1. Letter from C. H. Waddington to Francis Crick Publication: Produced: 27 December 1967 Subject(s): BiologyVitalismMacromolecular Substances Archival Collection: The Francis Crick Papers (Profiles in Science)
2. Letter from Francis Crick to C. H. Waddington Publication: Produced: 9 November 1967 Subject(s): BiologyVitalismPhysicsChemistry Archival Collection: The Francis Crick Papers (Profiles in Science)
