31. Lecture delivered by Henry F. Knapp, C.E., before the Polytechnic Branch of the American Institute (Cooper Institute), April 24, 1879: river surfaces Author(s): Knapp, Henry F. (Henry Francis), author Publication: [New York?] : [publisher not identified], [1879?] Subject(s): RiversFloodsEngineering
32. 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