T. O. Institute Nuku'alofa,
“Building a ferrocement water tank”, vol. no. 9. University of the South Pacific, Institute of Rural Development, Nuku'alofa, Tonga, p. 16 p.: ill., 1988.
A. Nilsson,
Groundwater dams for small-scale water supply, [Rev. ed.]. London, UK: IT Publications, 1988, p. 69 p.: fig., tab.
UNDP -New York, NY, US,
“Roof catchments, roof coverings, guttering, downpipes”. UNDP Department of Technical Cooperation for Development, Suva, Fiji, p. 49 p.: fig., 1988.
I. Rajiv Gand IN,
“Seminar on water harvesting systems and their management, Bangalore, 22-24 December 1988”. Rajiv Gandhi National Drinking Water Mission, New Delhi, India, p. 2 vol. (145, 107 p.): fig., photogr., tab., 1988.