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<b>Cost of introduction:</b> Variable US$ 15,000 - 30,000 per project, including: production drill set, drawings, hands-on training, first wells.
==Stone Hammer Drilling Manual==
PRACTICA foundation and ETC Energy have put together a manual on the Rota Sludge & Stone Hammer drilling: [http://www.connectinternational.nl/files/Rota%20sludge%20and%20stonehammer%20drilling.pdf Volume I Drilling Manual], [http://www.practicafoundation.nl/wp-content/uploads/PDF/practica-production-rs-versie-1th-september-051.pdf Volume II Production Manual]
== External links ==
* [http://www.worldbank.org www.worldbank.org ]
* [http://www.practicafoundation.nl www.practicafoundation.nl ]