VITA -Arlington, VA, US,
Village technology handbook. Arlington, VA, USA: Volunteers in Technical Assistance, 1988, p. xiv, 422 p. : fig.
United Nations -New York, NY, US,
Water resources planning to meet long-term demand : guidelines for developing countries, vol. no. 21. New York, NY, USA: United Nations Department of Technical Co-operation for Development, 1988, p. viii, 117 p.: fig., tab.