491 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-08-30 14:16:00
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492 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-04-30 15:10:18
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493 | Add to Reading ListSource URL: www.imwa.infoLanguage: English - Date: 2013-07-13 05:50:01
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494 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-11-25 14:25:28
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495 | Add to Reading ListSource URL: www.tn.govLanguage: English - Date: 2013-01-02 12:28:38
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496 | Add to Reading ListSource URL: www.unece.orgLanguage: English - Date: 2009-09-16 00:13:07
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497 | Add to Reading ListSource URL: ec.europa.euLanguage: English - Date: 2012-10-18 12:26:28
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498 | Add to Reading ListSource URL: ec.europa.euLanguage: English - Date: 2012-10-18 12:26:29
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499 | Add to Reading ListSource URL: www.unece.orgLanguage: English - Date: 2009-09-16 00:13:23
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500 | Add to Reading ListSource URL: www.bir.orgLanguage: English - Date: 2013-05-05 16:03:23
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