TY - BOOK AU - Welch,E.B. AU - Lindell,T. TI - Ecological effects of waste water SN - 0521224950. AV - QH 545 .W49W4 1980 U1 - 574.5/263 PY - 1980/// CY - Cambridge [Eng.], New York PB - Cambridge University Press KW - Sewage KW - Environmental aspects N1 - Includes index; includes bibliographical references and index ER -