21 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-02-14 13:23:21
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22 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-03-30 11:57:00
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23 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2003-02-11 14:41:36
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24 | Add to Reading ListSource URL: ns1.ias.ac.inLanguage: English - Date: 2003-12-16 03:11:14
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25 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-01-24 15:03:21
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26 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2009-02-02 09:34:27
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27 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-01-19 10:23:55
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28 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-05-11 10:19:22
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29 | Add to Reading ListSource URL: pdf.easechem.comLanguage: English - Date: 2009-04-27 07:52:18
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30 | Add to Reading ListSource URL: www.americanelements.comLanguage: English - Date: 2012-10-04 01:59:06
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