11 | Add to Reading ListSource URL: www.iwaweb.orgLanguage: English - Date: 2013-12-16 03:54:12
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12 | Add to Reading ListSource URL: www.bgs.ac.ukLanguage: English - Date: 2006-09-06 11:36:41
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13 | Add to Reading ListSource URL: www.bgs.ac.ukLanguage: English - Date: 2015-03-10 08:03:37
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14 | Add to Reading ListSource URL: www.bgs.ac.ukLanguage: English - Date: 2005-11-14 06:52:09
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15 | Add to Reading ListSource URL: www.bgs.ac.ukLanguage: English - Date: 2006-11-20 11:14:02
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16 | Add to Reading ListSource URL: www.bgs.ac.ukLanguage: English - Date: 2006-08-24 10:09:26
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17 | Add to Reading ListSource URL: www.globalwitness.orgLanguage: English - Date: 2014-08-28 10:45:10
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18 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2010-12-05 23:00:00
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19 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-11-01 15:32:07
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20 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-11-15 13:58:41
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