TY - BOOK TI - Automation of wastewater treatment facilities : WEF manual of practice no. 21 SN - 9780071479370 U1 - 628.4 AUT 2007 PY - 2007/// CY - New York PB - McGraw-Hill KW - Sewage disposal KW - Technological innovations KW - Sewage sludge N1 - Includes bibliographical references and index ER -