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Biblio

Found 6 results
Filters: Keyword is percussion drilling  [Clear All Filters]
2006
K. Danert, « A brief history of hand drilled wells in Niger : only the beginning ». Water and Sanitation Program - African Region, Nairobi, Kenya, p. 15 p. : 1 fig, 1 map, 5 boxes, 1 tab., photogr., 2006.
K. Danert, « A brief history of hand-drilled wells in Niger », Waterlines, an international journal of water, sanitation and waste, p. p. 4-6 : 2 boxes, 4 photogr., 2006.
1986
B. C. Mal et Mishra, A. P., « Low-cost tubewells for developing countries », International journal for development technology, p. p. 197-203, 1986.
A. Ohlsson, « Well-drilling rigs in rural Africa : a comparative study ». Linkoping University, Institute of Technology, Linkoping, Sweden, p. 87 p.: fig., tab., 1986.
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