54
edits
Changes
no edit summary
* [http://www.practicafoundation.nl/wp-content/uploads/PDF/practica-production-rs-versie-1th-september-051.pdf Rota-sludge and Stone Hammer drilling, part two: Production Manual] by Practica Foundation.
* [http://www.practicafoundation.nl/products/drilling-wells/ Stone hammer info on www.practicafoundation.nl]
* [http://www.rwsn.ch/prarticle.2005rural-10water-25supply.9856177177net/prarticle.2005-10-26.7220595116en/prarticle.2005-11-15.6127855822implementation/prarticle.2009manual-05-11.3051371225 drilling manual Hand Drilling Techniques.] Rural Water Supply Network. An analysis and comparison of all the drilling techniques, including 3 in-depth manuals of comparisons.