21 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-04-23 13:24:48
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22 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1996-08-13 14:08:53
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23 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-05-21 09:55:01
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24 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-01-31 10:10:17
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25 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-05-25 14:16:18
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26 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-06-19 07:55:34
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27 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-31 11:02:32
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28 | Add to Reading ListSource URL: www.scripps.eduLanguage: English - Date: 2013-07-25 20:06:14
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29 | Add to Reading ListSource URL: stoltz.caltech.eduLanguage: English - Date: 2010-04-16 04:22:45
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30 | Add to Reading ListSource URL: stoltz.caltech.eduLanguage: English - Date: 2010-04-15 20:05:51
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