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Westgarth, Warren Cyril, Martin E. Northcraft, Oregon. State Water Resources Board, and Oregon State University. Engineering Experiment Station. Water quality data inventory In Bulletin (Oregon. State Water Resources Board). Vol. no.1. Salem, OR: Engineering Experiment Station, Oregon State College, 1956.
Northcraft, Martin E., Warren C. Westgarth, and Oregon State College. Engineering Experiment Station. Water quality data inventory supplement In Oregon State Water Resources Board Bulletin. Vol. no.2. Salem, Or: Oregon State Water Resources Board, 1957.