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Shaw, R. and Smith, M., Technical brief no. 50 : sanitary surveying, Waterlines, an international journal of water, sanitation and waste, pp. p. 15-18 : 2 boxes, 3 fig, 2003.
Wijk-Sijbesma, C.A. van and Smet, J.E.M., Small community water supplies : technology, people and partnership, vol. no. 40. Delft, The Netherlands: IRC, 2002, p. 585 p.: fig., tab.
Halcrow Group -London, GB and UNICEF -New York, NY, US, Drawings of rural water supply and sanitation : modules. UNICEF, New York, NY, USA, p. i, 63 p.: 63 technical drawings, 1989.
Visscher, J.T. and Veenstra, S., La filtration lente sur sable : manuel d'entretien, vol. no. 1. IRC, The Hague, The Netherlands, p. viii, 72 p.: ill., 1988.
Bridger, G.A., Rural water supply, vol. no. D1. Ratmalana, Sri Lanka: National Water Supply and Drainage Board, 1988, p. 72 p.: fig.
Sundaresan, B.B., Huisman, L., Hofkes, E.H., Azevedo Netto, J.M. de, and Lanoix, J.N., Sistema de abastecimiento de agua para pequenas comunidades : tecnologia de pequenos sistemas de abastecimiento de agua en paises en desarrollo, Enlarged ed., vol. no. 18. Lima, Peru: CEPIS (Centro Panamericano de Ingenieria Sanitaria y Ciencias del Ambiente), 1988, p. vii, 384 p.: fig., tab.
National Environmental Engineering Research Institute -Nagpur, IN, NEERI, [ .. title in Hindi .. ] [Slow sand filtration : manual for caretakers]. National Environmental Engineering Research Institute, NEERI, Nagpur, India, p. 68 p.: fig., 1988.
Veenstra, S. and Visscher, J.T., Slow sand filtration : manual for caretakers, vol. no. 1. IRC, The Hague, The Netherlands, p. vi, 73 p.: ill., 1985.