1. Letter from Joshua Lederberg to Michael Heidelberger Publication: Produced: 12 November 1956 Subject(s): PolysaccharidesMolecular Structure Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
2. Letter from Joshua Lederberg to Michael Heidelberger Publication: Produced: 30 November 1956 Subject(s): PolysaccharidesMolecular Structure Archival Collection: The Michael Heidelberger Papers (Profiles in Science)