1. The water we drink: giving an account of the impurities to which it is liable, and the best methods of removing them Author(s): Gate City Stone Filter Co., author. Publication: New York : Gate City Stone Filter Co., [1885] Subject(s): Water SupplyDrinking WaterWater Purification -- methods
2. Filtration Author(s): Maignen, P. A. Publication: Philadelphia : Maignen's Filtration Company, [1898?] Subject(s): Water Purification -- methodsWater SupplyPhiladelphia
3. The filtration of public water supplies Author(s): Leffmann, Henry, 1847-1930 author Publication: [Philadelphia?] : [publisher not identified], [1895?] Subject(s): Water SupplyWater Purification -- methods
