H. Zeng and Wu, J., “Heavy metal pollution of lakes along the mid-lower reaches of the Yangtze River in China : intensity, sources and spatial patterns”, International journal of environmental research and public health [Int. J. Environ. Res. Public Health], pp. p. 793 - 807; 7 fig.; 2 tab., 2013.

M. S. Babel and Wahif, S. W., “Freshwater under threat : South East Asia : vulnerability assessment of freshwater resources to environmental change : Mekong River Basin”. UNEP, United Nations Environment Programme, Nairobi, Kenya, p. xii, 31 p.; 9 fig.; 9 tab.; 2 boxes; photographs, 2009.

M. S. Babel and Wahif, S. W., Freshwater under threat : South Asia : vulnerability assessment of freshwater resources to environmental change : Ganges-Brahmaputra-Meghna River Basin, Helmand River Basin, Indus River Basin. Nairobi, Kenya: UNEP, United Nations Environment Programme, 2008, p. xv, 29 p. : fig, tab.

Chemonics International -Washington, DC, US, “Morocco water resources sustainability project : final report”. USAID Development Experience Clearinghouse, Washington, DC, USA, p. 78 p. : fig,, tabs., 2004.

T. Thompson, Sobsey, M., and Bartram, J., “Providing clean water, keeping water clean : an integrated approach”, International journal of environmental health research, pp. p. 89-94, 2003.

M. D. Sobsey, “Managing water in the home : accelerated health gains from improved water supply”. World Health Organization (WHO), Geneva, Switzerland, p. vii, 70 p. : 21 tab., 2002.

C. A. van Wijk-Sijbesma 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.

Naturgerechte Technologien, Bau- und Wirtschaftsberatung -Frankfurt, GE, TBW, “Treatment of tannery wastewater”. German Appropriate Technology Exchange (GATE) /Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ), Eschborn, Germany, p. 11 p. : 3 fig., 1 photogr., 3 tabs., 2002.

A. Robinson, “Arsenic mitigation in West Bengal and Bangladesh : helping households respond to a water quality crisis”, vol. no. 3. Water and Sanitation Program, WSP, Washington, DC, USA, p. 15 p. : boxes, fig., photogr., tab., 2000.

T. H. Y. Tebbutt, Principles of water quality control, 5th ed.th ed. Oxford, UK: Butterworths-Heinemann, 1998, p. viii, 280 p. : fig., ill., tab.

T. J. Casey, Unit treatment processes in water and wastewater engineering. Chichester, UK: Wiley, 1997, p. xii, 280 p. : fig., photogr., tab.

D. D. Mara and Oragui, J. I., Enumeration of rotaviruses in tropical wastewaters, vol. no. 10. Leeds, UK: University of Leeds, Department of Civil Engineering, 1996, p. ix, 55 p. : tab.

J. T. Visscher, J. M., L., and G. C., G., “Performance evaluation of dynamic roughing filtration”, in Advances in slow sand and alternative biological filtration, 1996, pp. P. 349-358 : 5 fig., 3 tab.

O. Montero, Alternativas para la desinfeccion del agua a nivel local en Cuba : elementos para acciones en el corto plazo. Habana, Cuba: UNICEF, 1994, p. 93 p. : 8 fig., 17 tab.

M. R. Collins, Cole, J. O., Westersund, C. M., and Paris, D. B., “Assessing roughing filtration design variables”, Water supply : the review journal of the International Water Supply Association, pp. p. SS 5.29 - 5.40: 9 fig., 11 tab., 1994.

M. Gambrill, “An engineering response to the needs of Burmese refugees in Bangladesh”, Waterlines, an international journal of water, sanitation and waste, pp. p. 7-10: photogr., 1994.

L. J. M., “Performance evaluation of dynamic roughing filtration”, vol. no. 137. IHE (International Institute for Infrastructural, Hydraulic and Environmental Engineering), Delft, The Netherlands, p. vi, 83 p.: 30 fig., 11 tab., 1994.

J. T. Visscher, G. C., G., and Fernandez, J., “Comparative study of different pre-treatment alternatives”, Aqua : journal of water supply research and technology, pp. p. 337-346: 7 fig., 5 tab., 1993.

J. van der Heide and Dijkstra, I. T., Metodologia de potabilizacion de agua superficial en Nicaragua, vol. no. 41. Delft, The Netherlands: Delft University of Technology, Department of Civil Engineering, 1992, p. 2 vol.

C. O. C. I. N. A. R. A. - Cali and IRC International Water and Sanitation Centre, The Hague, NL, “Proyecto integrado de investigacion y demostracion de metodos de pretratemiento para sistemas de abastecimiento de agua : informe final : desarrollo, logros y perspectivas”. IRC, The Hague, The Netherlands, p. xxix, 233 p.: 52 fig., 47 tab., 1992.

W. Schaefer, Public health engineering : a lecture note-book. Delft, The Netherlands: Delft University of Technology, CICAT, 1992, p. 299 p. : 81 fig., 19 tab.

S. Mesfin, “Constructing and operating treatment plants”, in Infrastructure, environment, water and people : proceedings of the 17th WEDC Conference, United Nations Centre for Human Settlement (Habitat), Nairobi, Kenya, 19-23 August 1991, 1991, pp. P. 139-142: 3 fig., 1 tab.

C. Chibi, “Design and performance of a community-level iron removal plant”, Waterlines, an international journal of water, sanitation and waste, pp. p. 9-10: 2 fig., 2 tab., photogr., 1991.

H. Bernhardt and Ives, K., “IWSA/IAWPRC joint specialized conference on coagulation, flocculation, filtration, sedimentation and flotation : 24-26 April 1990, Jonkoping”. pp. p. 1-203: fig., tab., 1991.

H. C. Arora and Nagpal, J. L., “Performance evaluation of defluoridation plant at Fazilpur, Gurgaon (Haryana)”, Journal of Indian Water Works Association, pp. p. 255-259: 1 fig., 1 tab., 1991.