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*[[Solution_of_the_week_13|Akvo solution of the week 13]]
==Acknowledgements==* The basis for the material on this page was obtained from a desk study shortly to be published on the website of the [http://www.practicafoundation.nl/ Practica Foundation], and from the [http://www.rwsnrural-water-supply.chnet/ Rural Water Supply Network], and specifically its [http://www.rwsn.ch/prarticle.2005rural-10water-25supply.9856177177net/prarticle.2005-10-26.7220595116en/implementation/prarticle.2005manual-11-15.6127855822 drilling manual drilling section].
* [http://www.lboro.ac.uk/well/resources/technical-briefs/43-simple-drilling-methods.pdf 43. Simple drilling methods.] WEDC.
