21 | Add to Reading ListSource URL: www.dnr.mo.govLanguage: English - Date: 2011-12-08 12:10:27
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22 | Add to Reading ListSource URL: www.dnr.mo.govLanguage: English - Date: 2014-04-07 09:31:37
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23 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-09-22 14:01:19
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24 | Add to Reading ListSource URL: www.owrb.ok.gov- Date: 2014-09-30 15:30:45
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25 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2014-08-22 15:27:19
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26 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-10-16 17:44:52
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27 | Add to Reading ListSource URL: files.dnr.state.mn.usLanguage: English - Date: 2014-04-02 12:37:54
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28 | Add to Reading ListSource URL: www.msha.govLanguage: English - Date: 2014-07-24 09:55:30
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29 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2002-10-09 08:07:56
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30 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2002-04-30 08:29:30
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