21. Apparatus for collecting water for bacteriological examination Author(s): Dixon, Samuel Gibson, 1851-1918, author Publication: Philadelphia : The American Medical Press Company, 1891 Subject(s): Drinking Water -- analysisSpecimen Handling -- instrumentationWater Microbiology
22. A contribution to the study of water-borne cholera Author(s): Homan, George, 1846-1928, author Publication: [New York?] : D. Appleton and Company, [1895] Subject(s): Cholera -- etiologyWater MicrobiologyRivers