TY - BOOK ED - World Health Organization. TI - Operation and maintenance of urban water supply and sanitation systems SN - 9241544716 AV - TD327 .O63 1994 U1 - 363.6/1/091724 20 PY - 1994/// CY - Geneva PB - World Health Organization KW - Municipal water supply KW - Developing countries KW - Management KW - Sanitation N1 - Includes bibliographical references (p. 101-102) ER -