51 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-09-13 14:13:59
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52 | Add to Reading ListSource URL: www.eawag.chLanguage: English - Date: 2013-07-05 01:06:33
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53 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-09-17 08:11:31
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54 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2010-01-27 10:18:36
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55 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-09-14 12:34:27
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56 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-02-05 09:16:29
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57 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-03-11 09:55:56
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58 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-08-15 09:11:42
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59 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-31 11:11:56
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60 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-02-14 13:35:14
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