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Percussion drilling

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→‎Manuals, videos and links
* A Water Handbook, Technical Guidelines Series, UNICEF, 1999 - Programming and implementation. [http://www.unicef.org/wash/files/Wat_e.pdf Download].
* Technology notes, section 7; Tube wells and boreholes, WaterAid - An overview of human-powered drilling technologies. [http://www.ewbwateraid.neu.eduorg/~/wikimedia/filesPublications/Technology_notes_07_web_1technology-notes-2011.pdf Download]. Website of [http://www.wateraid.org/uk Wateraid.org].
* Water for the World, Technical note series rws 2, USAID 1982 - Technical notes on methods of developing of groundwater, manual drilling techniques. [http://www.lifewater.org/resources/ground_water.html Website Lifewater International]. Under 'Cable Tool Wells'.
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