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Start Over You searched for: Authors Bock, Carl Ernst, 1809-1874, author Remove constraint Authors: Bock, Carl Ernst, 1809-1874, author Subjects Typhus, Epidemic Louse-Borne -- epidemiology Remove constraint Subjects: Typhus, Epidemic Louse-Borne -- epidemiology Subjects Relapsing Fever -- epidemiology Remove constraint Subjects: Relapsing Fever -- epidemiology Dates by Range 1850-1899 Remove constraint Dates by Range: 1850-1899
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