1. Letter from Michael Heidelberger to Walter W. Palmer, Public Health Research Institute Publication: Produced: 24 September 1947 Subject(s): OxyhemoglobinsImmunochemistry Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
2. Letter from K. Starr Chester, Rockefeller Institute for Medical Research to Michael Heidelberger Publication: Produced: 7 May 1936 Subject(s): ImmunochemistryAntibodies Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
3. Letter from Michael Heidelberger to E. J. Crane, Chemical Abstracts Publication: Produced: 18 December 1939 Subject(s): ImmunochemistryAbstracting and Indexing as Topic Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
4. Letter from Simon Flexner, Rockefeller Institute for Medical Research to Michael Heidelberger Publication: Produced: 2 May 1932 Subject(s): ImmunochemistryPrecipitin Tests Archival Collection: The Michael Heidelberger Papers (Profiles in Science)