1. Letter from Michael Heidelberger to Kai O. Pedersen Publication: Produced: 30 November 1934 Subject(s): AntibodiesUltracentrifugation Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
2. Letter from Michael Heidelberger to Kai O. Pedersen Publication: Produced: 15 February 1935 Subject(s): Molecular WeightThyroglobulinUltracentrifugation Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
3. Letter from Kai O. Pedersen to Michael Heidelberger Publication: Produced: 20 October 1936 Subject(s): AntibodiesMolecular WeightUltracentrifugation Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
4. Letter from Kai O. Pedersen to Michael Heidelberger Publication: Produced: 27 January 1935 Subject(s): Molecular WeightThyroglobulinUltracentrifugation Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
5. Letter from Kai O. Pedersen to Michael Heidelberger Publication: Produced: 19 November 1934 Subject(s): UltracentrifugationElectrophoresis Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
