21 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-10-12 23:22:34
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22 | Add to Reading ListSource URL: www.ccme.caLanguage: English - Date: 2008-12-08 10:00:31
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23 | Add to Reading ListSource URL: www.handbookofmineralogy.orgLanguage: English - Date: 2007-09-30 02:24:46
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24 | Add to Reading ListSource URL: geosurvey.state.co.usLanguage: English - Date: 2013-02-26 16:32:23
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25 | Add to Reading ListSource URL: pmr.cuni.czLanguage: English - Date: 2007-10-12 03:48:49
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26 | Add to Reading ListSource URL: www.handbookofmineralogy.orgLanguage: English - Date: 2007-09-30 01:57:42
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27 | Add to Reading ListSource URL: www.handbookofmineralogy.orgLanguage: English - Date: 2007-09-30 02:26:58
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28 | Add to Reading ListSource URL: www.handbookofmineralogy.comLanguage: English - Date: 2007-09-30 02:49:30
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29 | Add to Reading ListSource URL: rruff.infoLanguage: English - Date: 2008-01-24 13:53:42
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30 | Add to Reading ListSource URL: www.handbookofmineralogy.orgLanguage: English - Date: 2007-09-30 02:47:34
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