Biblio

S. Maddrell and Neal, I., Sand dams : a practical guide. London, UK: Excellent Development Ltd., 2012, p. 152 p.; 40 fig.; 11 tab.; 1 map; 41 photographs; 2 boxes.

J. E. M. Smet and Visscher, J. T., “Pre-treatment methods for community water supply : an overview of techniques and present experience”. IRC, The Hague, The Netherlands, p. 174 p.: fig., tab., 1989.