31 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2000-01-27 15:44:22
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32 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-05-18 14:00:50
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33 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-09-18 14:36:04
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34 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-11-13 12:06:25
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35 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-31 11:04:02
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36 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-09-07 10:55:55
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37 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-04-25 11:03:44
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38 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-02-08 09:32:03
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39 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-05-29 13:22:04
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40 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-11-15 11:12:10
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