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Results
of examinations of samples of deposits taken from the
bottom of the Delaware and Schuylkill rivers at Philadelphia.
Report on the Collection and Treatment of Sewage
of the City of Philadelphia, 1914, p. 138.
bottom of the Delaware and Schuylkill rivers at Philadelphia.
Report on the Collection and Treatment of Sewage
of the City of Philadelphia, 1914, p. 138.
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1914_riverbottom_p138.jpg
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