1. Letter from Michael Heidelberger to C. W. Shilling, United States Department of the Navy Publication: Produced: 11 February 1952 Subject(s): Immune Seragamma-Globulins Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
2. Letter from M. V. Lakshminarayan Rao, Central Food Technological Research Institute (Mysore, India) to Michael Heidelberger Publication: Produced: 13 August 1953 Subject(s): Immune Seragamma-Globulins Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
3. Letter from Elvin A. Kabat to Michael Heidelberger Publication: Produced: [23 November 1937] Subject(s): Immune SeraAntibodiesMolecular Weight Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
4. Letter from Elvin A. Kabat to Michael Heidelberger Publication: Produced: [22 July 1938] Subject(s): Immune SeraAntibodiesCrystallography, X-RayMolecular Weight Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
5. Letter from Linus Pauling to Michael Heidelberger Publication: Produced: 28 September 1942 Subject(s): AntigensAntibodiesImmune Sera Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
6. Letter from Michael Heidelberger to Linus Pauling Publication: Produced: 2 October 1942 Subject(s): AntigensAntibodiesImmune Sera Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
7. Letter from Melvin Cohn, Washington University School of Medicine to Michael Heidelberger Publication: Produced: 20 November 1956 Subject(s): Immune SeraGalactosidases Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
