R. Brassington,
Field hydrogeology. Buckingham, UK: Open University Press, 1988, p. xiii, 175 p.: fig., tab.
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.
UNDTCD -New York, NY, US,
«Groundwater economics : report of a United Nations international symposium and workshop convened in co-operation with the government of Spain, Barcelona, Spain, 19-23 October 1987». United Nations Department of Technical Co-operation for Development, New York, NY, USA, p. v, 65 p., 1988.
M. Detay y Poyet, P.,
«Hydrolab version VI.4 : un systeme expert d'aide a l'implantation de forages en hydraulique villageoise», vol. no. 936. Institut National de Recherche en Informatique et en Automatique, Le Chesnay, France, p. 38 p., 1988.
«Impacts of urbanization of the Greater Cairo area on the ground water in the underlying aquifer», in
International symposium, 24-29 April 1988 : hydrological processes and water management in urban areas : proceedings of the conference, 1988, pp. P. 517-524: fig., tab.
UNDP -New York, NY, US, UNDTCD -New York, NY, US, y Nairobi, K. E. U. N. E. P. -,
«Transnational project on the major regional aquifer in North-east Africa : proceedings of the project workshop held in Khartoum, Sudan, 12th-14th December, 1987». United Nations Department of Technical Co-operation for Development, New York, NY, USA, p. 64 p.: fig., tab., 1988.