1. Letter from Fred L. Soper to Wilbur A. Sawyer Publication: Produced: 7 July 1939 Subject(s): Mosquito ControlMalariaBudgetsFinancial Support Archival Collection: The Fred L. Soper Papers (Profiles in Science)
2. Letter from Lewis Hackett to Fred L. Soper Publication: Produced: 12 October 1955 Subject(s): Financial SupportMosquito ControlYellow Fever Vaccine Archival Collection: The Fred L. Soper Papers (Profiles in Science)
3. Letter from Fred L. Soper to Lewis Hackett Publication: Produced: 18 October 1955 Subject(s): Financial SupportMosquito ControlYellow Fever Vaccine Archival Collection: The Fred L. Soper Papers (Profiles in Science)
4. Letter from Fred L. Soper to Leonel Tavares Miranda de Albuquerque Publication: Produced: 24 August 1967 Subject(s): AedesMosquito ControlBrazilYellow Fever Archival Collection: The Fred L. Soper Papers (Profiles in Science)
5. Letter from Fred L. Soper to Paulo C. A. Antunes Publication: Produced: 22 August 1967 Subject(s): Yellow FeverMosquito ControlAedesBrazil Archival Collection: The Fred L. Soper Papers (Profiles in Science)
6. Letter from Fred L. Soper to Paulo C. A. Antunes Publication: Produced: 26 September 1968 Subject(s): BrazilUnited StatesAedesMosquito Control Archival Collection: The Fred L. Soper Papers (Profiles in Science)
7. Letter from Fred L. Soper to Wilbur A. Sawyer Publication: Produced: 23 November 1938 Subject(s): Mosquito ControlCulicidaeBudgetsMalariaFinancial Support Archival Collection: The Fred L. Soper Papers (Profiles in Science)
