TY - BOOK AU - Hagan,Edmund TI - Principles of water and wastewater treatment SN - 9781781541975 PY - 2012/// CY - London, UK PB - Auris Reference KW - Water KW - Purification KW - Sewage KW - Water treatment plants KW - Management KW - Sewage disposal plants N1 - Includes bibliographical references and index ER -