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Start Over You searched for: Subjects Sewage Remove constraint Subjects: Sewage Authors Waring, George E. Jr. (George Edwin), 1833-1898, author Remove constraint Authors: Waring, George E. Jr. (George Edwin), 1833-1898, author

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1. The purification of sewage by bacterial oxidation: a study of the natural processes of filth removal and of the means by which their efficiency may be artificially intensified : including a description of works for sewage disposal at Willow Grove Park, Philadelphia, Pa