F. G. Driscoll,
Groundwater and wells, 2nd ed.nd ed. St. Paul, MN, USA: Johnson Division, 1986, p. xv, 1089 p.: fig., photos, tab.
United Nations -New York, NY, US,
Groundwater in continental Asia (Central, Eastern, Southern, South-Eastern Asia), vol. no. 15. New York, NY, USA: United Nations Department of Technical Co-operation for Development, 1986, p. viii, 391 p.: tab., map.
N. A. Amesz,
“Groundwater prospecting and development in the Sahel Region of West Africa”,
Land + water international : NEDECO magazine on water, transport, infrastructure and environment, pp. p. 11-14: 4 fig., 3 photogr., 1986.