911 | Add to Reading ListSource URL: www.tulli.fiLanguage: English - Date: 2014-02-19 07:20:34
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912 | Add to Reading ListSource URL: www.eena.orgLanguage: English - Date: 2014-01-22 10:33:11
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913 | Add to Reading ListSource URL: www.gov.ukLanguage: English - Date: 2013-03-05 07:04:19
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914 | Add to Reading ListSource URL: science.widener.edu- Date: 1999-07-22 13:06:21
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915 | Add to Reading ListSource URL: science.widener.eduLanguage: English - Date: 2012-08-30 20:39:41
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916 | Add to Reading ListSource URL: www.webchem.netLanguage: English - Date: 2005-04-11 14:40:51
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917 | Add to Reading ListSource URL: science.widener.eduLanguage: English - Date: 1999-03-05 13:23:31
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918 | Add to Reading ListSource URL: science.widener.edu- Date: 1999-07-22 13:06:18
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919 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2005-12-01 08:55:12
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920 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2003-02-11 10:45:14
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