1. Letter from W. H. Crichton to D. Gordon Cheyne Publication: Produced: 23 December 1943 Subject(s): Typhus, Epidemic Louse-BorneAttitude of Health PersonnelOrganization and Administration Archival Collection: The Fred L. Soper Papers (Profiles in Science)
2. Letter from W. H. Crichton to D. Gordon Cheyne Publication: Produced: 24 December 1943 Subject(s): Typhus, Epidemic Louse-BorneAttitude of Health PersonnelOrganization and Administration Archival Collection: The Fred L. Soper Papers (Profiles in Science)
3. Letter from C.M.F. to C.G.S. Publication: Produced: 3 January 1944 Subject(s): Organization and AdministrationTyphus, Epidemic Louse-Borne Archival Collection: The Fred L. Soper Papers (Profiles in Science)
