21 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-10-11 07:49:10
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22 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1996-12-17 14:50:26
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23 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-01-30 07:39:28
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24 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-31 11:13:48
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25 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-05-17 08:58:34
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26 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-03-26 13:24:22
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27 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-09-17 08:17:30
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28 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-09-14 13:34:18
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29 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-02-06 14:48:26
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30 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-02-04 07:26:05
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