TY - BOOK AU - Schulz Christopher R AU - Okum Daniel A TI - Surface water treatment for communities in developing countires SN - 1853391425(pbk) U1 - D855.1(X), M4 PY - 1984/// CY - London PB - Intermediate Technology publications KW - Developing Countries KW - Purification KW - Sanitary KW - Water KW - Engineering ER -