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→External links
An excellent but slightly outdated summary of hund dug wells by Koegel is made available by the UN FAO at [http://www.fao.org/docrep/X5567E/x5567e06.htm#5.%large%diameter%wells Large Diameter Wells]
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An excellent guide by the highly experienced British Drilling Company can be found at [http://www.consallen.com/welldigging/Hand_Dug_Wells-MCM.pdf Consallen]
==References==