A. Vickers,
“The emerging demand-side era in water management”,
Journal American Water Works Association, pp. p. 38-43: 1 fig., 3 tab., photogr., 1991.
C. Reij,
Indigenous soil and water conservation in Africa, vol. no. 27. London, UK: International Institute for Environment and Development (IIED), 1991, p. 35 p.: 4 fig., 2 tab.
P. P. Macy,
“Integrating conservation and water master planning”,
Journal American Water Works Association, pp. p. 44-47: 2 fig., 3 tab., 1991.
UNDTCD -New York, NY, US,
“Legislative and economic approaches to water demand management”. United Nations DTCD,Water Resources Branch, New York, NY, USA, p. vi, 58 p.: 1 tab., 1991.
EPA -Washington, DC, US,
“Manual of individual and non-public water supply systems”. US Environmental Protection Agency (EPA), Washington, DC, USA, p. vi, 181 p.: fig., tab., 1991.
EPA -Washington, DC, US,
“Manual of small public water supply systems”. US Environmental Protection Agency (EPA), Washington, DC, USA, p. vi, 211 p.: fig., tab., 1991.
J. Lundqvist, Sivanappan, R. K., and Ramakrishnan, T.,
“Water conservation and integrated resources management : a case study on Interface Forestry Programme in Allikuli watershed, Thiruvallur division, Tamil Nadu, India”, in
Copenhagen informal consultation on integrated water resources development and management, 11-14 November, 1991 : case studies : Nordic Freshwater Initiative, 1991, p. 33 p.: fig., tab.