TY - GEN AU - Jahn,Samia al Azharia TI - Traditional water purification in tropical developing countries: existing methods and potential application T2 - GTZ-publications SN - 3880851166 U1 - 628 .72 091724 19 PY - 1981/// CY - Eschborn, Federal Republic of Germany PB - German Agency for Technical Cooperation (GTZ) KW - Drinking water KW - Tropics KW - Purification KW - Handbooks, manuals, etc KW - Developing countries N1 - Includes bibliographies and index ER -