1. 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)
2. 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)
3. Deadly Mosquito Wiped Out in Brazil Publication: New York Times Company, 19 March 1941 Subject(s): Yellow FeverYellow Fever VaccineDisease Transmission, InfectiousMosquito Control Archival Collection: The Fred L. Soper Papers (Profiles in Science)
