Analysis and interpretation of water-quality trends in major U.S. rivers, 1974-81 / by Richard A. Smith, Richard B. Alexander, and M. Gordon Wolman (U.S. Geological Survey water-supply paper ; 2307)
Analysis and interpretation of water-quality trends in major U.S. rivers, 1974-81 / by Richard A. Smith, Richard B. Alexander, and M. Gordon Wolman
(U.S. Geological Survey water-supply paper ; 2307)