31 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2003-12-24 08:54:06
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32 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-07-03 09:04:31
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33 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-02-04 12:50:37
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34 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1998-02-26 08:38:48
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35 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1997-03-07 09:19:57
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36 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-01-19 08:24:41
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37 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-11-01 14:57:43
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38 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-05-31 10:34:14
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39 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-08-01 09:03:22
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40 | Add to Reading ListSource URL: www.dot.state.mn.usLanguage: English - Date: 2014-01-28 10:27:22
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