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 / by Geo. E. Waring ; including a description of works for sewage disposal at Willow Grove Park, Philadelphia, Pa.
|Main Author:||Waring, George E. 1833-1898.|
Charlotte, N.C. : Observer Print, [189-]
28 p., 6 leaves of plates :
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