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Filters: North Carolina State CollegeSouthern Water Resources and Pollution Control ConferenceRiddick, W. C. Wallace Carl , 1864-19421850-18591980-19891940-19491930-19391950-19591910-19191900-1909North Carolina State University. Department of Civil, Construction, and Environmental EngineeringNorth Carolina College of Agriculture and Mechanic ArtsNorth Carolina State University -- HistoryHas digitial content