Carr, S.J. Meyers, L.R.
The use ground water: experience in Sub-Saharan Africa Innovation in resource management: proceedings - Washington, D.C. (EUA) 1989 - p. 99-103
The use ground water: experience in Sub-Saharan Africa Innovation in resource management: proceedings - Washington, D.C. (EUA) 1989 - p. 99-103