Kempf, J E Effect of Aluminum Hydroxide Sedimentation, Sand Filtration and Chlorination on the Virus of Poliomyelitis. [electronic resource] - American journal of public health and the nation's health Dec 1942 - 1366-70 p. digital Publication Type: Journal Article ISSN: 0002-9572 Standard No.: 10.2105/ajph.32.12.1366 doi