PHI. Comité Nacional Alemán; PHI. Comité Nacional de Ghana; UNESCO; Report of the West African Sub Regional Workshop on Groundwater in Rural Water Supply (20-24 October 1986 : Accra, Ghana)(UNESCO, 1988)
PHI. Comité Nacional Finlandés; UNESCO; IAHS; Academia de Finlandia; Finlandia. National Committee for the Man and Biosphere.; International Symposium on the Hydrology of Wetlands in Temperate and Cold Regions (6-8 June 1988 : Joensuu, Finland)(Academy of Finland, 1988)