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1by Grover, Nathan Clifford, 1868-1956Subjects: “...Water resources development Colorado River Watershed (Colo.-Mexico)...”
Published 1930
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2Published 1971Subjects: “...Water quality Colorado River Watershed (Colo.-Mexico)...”
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3by Hendricks, E. L. (Ernest LeRoy), 1909-Subjects: “...Water quality Colorado River Watershed (Colo.-Mexico)...”
Published 1961
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