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Drilling or digging

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<font size="4">Manual drilling comparison of methods</divfont>
[[Image: Drilling Method Selection.jpg|thumb|center|600px|Drilling Method Selection. Chart: WEDC Loughborough University Leicestershire.]]
<font size="4">Manual drilling links</divfont>
* VIDEO: [http://www.thewaterchannel.tv/en/videos/categories/viewvideo/889/groundwater/how-to-professionalize-the-manual-drilling-sector-in-africa How to Professionalize the Manual Drilling Sector in Africa]. Produced by UNICEF.
* [http://www.rural-water-supply.net/en/resources/details/402 Human-Powered Drilling Technologies], Richard Carter, Cranfield University, 2005.
* [http://www.hydrology.nl/images/docs/ihp/nl/cop15/2_Richard_Taylor.pdf Groundwater and climate change in Africa: The Kampala Statement.] Richard Taylor, University College London (UK), IAH Commission of Groundwater & Climate Change.
<font size="4">Acknowledgements</divfont>
* [http://www.unicef.org/wash/files/04.pdf Understanding Groundwater and Wells in Manual Drilling]. Unicef.org.
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