REED, SHERWOOD C. NATURAL SYSTEMS FOR WASTE MANAGEMENT AND TREATMENT/ S.C. REED, R.W. CRITES, E.J. MIDDLEBROOKS - 2 - NEW YORK ; MEXICO: MCGRAW-HILL \\\\ - XI, 433 P. 23 CM. INCLUYE BIBLIOGRAFIAS E INDICE. ISBN: 0-07-060982-9 Subjects--Topical Terms: 1.AGUAS RESIDUALES - PURIFICACION.2.AGUA - CALIDAD - ADMINISTRACION. Dewey Class. No.: 628.35 R44