21. Letter from Fred L. Soper to Eugene P. Campbell Publication: Produced: 6 October 1967 Subject(s): Yellow FeverDiagnosis Archival Collection: The Fred L. Soper Papers (Profiles in Science)
22. Excerpt from Fred Soper's diary Publication: Produced: [21-24 January 1939] Subject(s): Yellow FeverFinancial SupportBudgets Archival Collection: The Fred L. Soper Papers (Profiles in Science)
23. Memorandum from Fred L. Soper to Abraham Horwitz Publication: Produced: 20 August 1974 Subject(s): Global HealthYellow FeverPublishing Archival Collection: The Fred L. Soper Papers (Profiles in Science)
24. Letter from Fred L. Soper to Pedro Galindo Publication: Produced: 24 May 1966 Subject(s): Yellow FeverFellowships and Scholarships Archival Collection: The Fred L. Soper Papers (Profiles in Science)
25. Excerpt from Fred Soper's diary Publication: Produced: [May-June 1928] Subject(s): Yellow FeverDiagnosisEpidemiologyFinancial Support Archival Collection: The Fred L. Soper Papers (Profiles in Science)
26. Excerpt from Fred Soper's diary Publication: Produced: [1 January-16 February 1929] Subject(s): Yellow FeverFinancial SupportEpidemiology Archival Collection: The Fred L. Soper Papers (Profiles in Science)
27. Excerpt from Fred Soper's diary Publication: Produced: [14-30 April 1929] Subject(s): Yellow FeverEpidemiologyDiagnosisBrazil Archival Collection: The Fred L. Soper Papers (Profiles in Science)
28. Excerpt from Fred Soper's diary Publication: Produced: [1 May-27 July 1929] Subject(s): Yellow FeverBrazilInternational CooperationEpidemiologyFinancial SupportDiagnosisMosquito Control Archival Collection: The Fred L. Soper Papers (Profiles in Science)
29. Excerpt from Fred Soper's diary Publication: Produced: [26 February-1 July 1930] Subject(s): Yellow FeverOrganization and AdministrationMalariaDiagnosisMosquito Control Archival Collection: The Fred L. Soper Papers (Profiles in Science)
30. Excerpt from Fred Soper's diary Publication: Produced: [2 July-31 August 1930] Subject(s): Yellow FeverDiagnosisPatents as TopicBrazilEpidemiology Archival Collection: The Fred L. Soper Papers (Profiles in Science)