1. Letter from C. S. Stephenson to Wilbur A. Sawyer Publication: Produced: 9 December 1942 Subject(s): IranTyphus, Epidemic Louse-Borne Archival Collection: The Fred L. Soper Papers (Profiles in Science)
2. Letter from Henry Stimson to Fred L. Soper Publication: Produced: 31 May 1943 Subject(s): Typhus, Epidemic Louse-BorneAlgeria Archival Collection: The Fred L. Soper Papers (Profiles in Science)
3. Letter from Fred L. Soper to Leon A. Fox Publication: Produced: 2 September 1943 Subject(s): Typhus, Epidemic Louse-BorneLice Infestations Archival Collection: The Fred L. Soper Papers (Profiles in Science)
4. Letter from Fred L. Soper to Dudley A. Reekie Publication: Produced: 16 September 1943 Subject(s): Typhus, Epidemic Louse-BorneCooperative BehaviorLice Infestations Archival Collection: The Fred L. Soper Papers (Profiles in Science)
5. Letter from Fred L. Soper to Wilbur A. Sawyer Publication: Produced: 7 February 1944 Subject(s): Typhus, Epidemic Louse-BorneCooperative BehaviorLice Infestations Archival Collection: The Fred L. Soper Papers (Profiles in Science)