L. K. National W. Ratmalana,
Ground water, vol. no. D4. Ratmalana, Sri Lanka: National Water Supply and Drainage Board, 1988, p. ii, 53 p.: fig.
S. E. S. I. D. A. - Stockholm,
“Manual for improvement of traditional water sources”. Health through Sanitation and Water (HESAWA), Bukoba, Tanzania, p. 14 p.: ill., tab., 1988.
World Bank -Washington, DC, US and MW, M. Water Depa,
“Report on workshop on national strategies for operation and maintenance of rural groundwater supplies, Mangochi, Malawi, 1-4 December 1986”. World Bank, Water and Sanitation Division, Washington, DC, USA, p. 66 p.: fig., tab., 1988.
H. A. Heijnen and Boot, M. T.,
Ten years of experience : Community Water Supply and Sanitation Programme, Pokhara, Western Development Region, Nepal, vol. no. 26. The Hague, The Netherlands: IRC, 1988, p. IX, 104 p.: fig., tab.