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Filters: Keyword is manual drilling  [Clear All Filters]
Blankwaardt, B., Hand drilled wells : a manual on siting, design, construction and maintenance. Dar es Salaam, Tanzania: Rwegarulila Water Resources Institute, 1984, p. viii, 132 p.: fig., tab.
Brush, R.E., Wells construction : hand dug and hand drilled. Peace Corps, Washington, DC, USA, p. viii, 282 p.: fig., tab., 1979.


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