Sewage sludge:
Treatment and utilization of sludge, by Alexander Elsner; The drying of sludge, by Fr. Spillner, tr. by Kenneth and Rose S. Allen; Operation of mechanical sewage plants, by Fr. Spillner and Mr. Blunk, tr. by Emil Kuichling; Sludge treatment in the United States, by Kenneth Allen.

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Full view   University of California
Full view   University of California
Full view   Cornell University