21 | Add to Reading ListSource URL: www.blm.govLanguage: English - Date: 2014-09-05 22:02:46
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22 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-03-29 16:15:54
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23 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1997-03-10 10:08:18
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24 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-03-06 12:23:03
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25 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1998-02-24 11:20:30
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26 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1998-02-24 11:20:30
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27 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-03-10 10:08:18
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28 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-02-05 08:33:19
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29 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-01-19 09:00:33
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30 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2003-02-11 12:09:26
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