00727nam a2200193Ia 4500 CTU_150360 210402s9999 xx 000 0 und d 628.1 S635 Small community water supplies : Technology of small water supply systems in developing countries Edited by E.H. Hofkes ; Prepared with contributions from under the joint supervision of L. Huisman ... [et al.] The Hague, The Netherlands International Reference Centre for Community Water Supply and Sanitation 1983 Water-supply Developing countries Giang Trung tâm Học liệu Trường Đại học Cần Thơ