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Biblio
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burkina faso
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Langenegger, O.
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1994
O. Langenegger
,
“
Groundwater quality and handpump corrosion in [West] Africa
”
, vol. no. 8. UNDP-World Bank Water and Sanitation Program, Washington, DC, USA, p. xx, 143 p.: 85 fig., 23 tab., 1994.
1987
O. Langenegger
,
“
Groundwater quality in rural areas of Western Africa
”
. World Bank Regional Water and Sanitation Group Western Africa, Abidjan, Ivory Coast, p. 10 p.: fig., tab., 1987.
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