1. Tracts for the people Author(s): Snow, Edwin M. (Edwin Miller), 1820-1888 Publication: [Providence, 1865-66] Subject(s): HousingCholera -- transmission
2. Observations on the spread of Asiatic cholera: and its communicable nature Author(s): Evans, John, 1814-1897 Publication: Chicago, 1849 Subject(s): Cholera -- transmission