21 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2016-05-27 08:15:09
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22 | Add to Reading ListSource URL: srnl.doe.govLanguage: English - Date: 2015-10-13 15:21:10
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23 | Add to Reading ListSource URL: www.baronrings.comLanguage: English - Date: 2016-08-22 12:51:31
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24 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2016-01-28 12:40:38
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25 | Add to Reading ListSource URL: crustal.cr.usgs.govLanguage: English - Date: 2012-01-20 18:30:00
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26 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2015-08-13 16:14:47
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27 | Add to Reading ListSource URL: www.ncgeolsoc.orgLanguage: English - Date: 2016-01-30 16:10:12
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28 | Add to Reading ListSource URL: cfse.ps.uci.eduLanguage: English - Date: 2011-11-02 16:52:51
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29 | Add to Reading ListSource URL: www.wp.zinc.orgLanguage: English - Date: 2015-11-12 13:12:54
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30 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2016-02-22 12:00:04
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