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1957
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.
1956
Westgarth, Warren C., Martin Northcraft, and Oregon State College. Engineering Experiment Station. Water Quality Data Inventory In Oregon State Water Resources Board bulletin. Vol. no.1. [Salem, Or.]: Oregon State Water Resources Board, 1956.