G WATER RESOURCES: ELSON 20th WEDC Conference Colombo, Sri Lanka, 1994

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Date: 2009-05-14 07:36:05 Technology Infrastructure Water wells Drilling rig Petroleum engineering Petroleum geology Appropriate technology Borehole Oil well Drilling fluid Sludging Drill		G WATER RESOURCES: ELSON 20th WEDC Conference Colombo, Sri Lanka, 1994 Add to Reading List Source URL: www.watersanitationhygiene.org Download Document from Source Website File Size: 80,31 KB Share Document on Facebook

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