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Drilling or digging

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<font size="4">==Manual drilling comparison of methods</font>===
[[Image: Drilling Method Selection.jpg|thumb|none|600px|Drilling Method Selection. Chart: WEDC Loughborough University Leicestershire.]]
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<font size="4">==Manual drilling links</font>===
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<font size="4">==Acknowledgements</font>===
* [http://www.unicef.org/wash/files/04.pdf Understanding Groundwater and Wells in Manual Drilling]. Unicef.org.
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