River pollution control / editor, M. J. Stiff. Stiff, M. J. Water Research Centre (Great Britain) Water Pollution Congresses. Rivers Congresses. Water quality management Congresses. TD425 .R55 628.168 19 STR Proceedings of a conference organized by the Water Research Centre, April 1979. Includes bibliographical references and index. Chichester, Eng. : E. Horwood for the Water Research Centre, Stevenage Laboratory ; New York, N.Y. : distributed by Halstead Press, c1980. c1980. 1980 Text 423 p. : eng