Biblio

W. P. James, “Hydropower valve : a new application for an old device”, Journal American Water Works Association, 1998.

S. A. Ahmad, “Keeping centrifugal pump trouble free and energy saving tips”. Centre for Development of Rural Technology, Allahabad, India, p. 20 p. : drwngs., 1993.

G. B. Institutio London, Energy use and conservation in the water industry : proceedings of symposium held in London, England, on 3rd and 4th December 1980. London, UK: Institution of Water Engineers and Scientists (IWES), 1980, p. 74 p. : fig. tab.

U. States. De US and US, U. States. De, “Energy and water for sustainable living: a compendium of energy and water succes stories:”. USAID, Washington, DC, USA, p. xii, 124 p. : fig., photogr.