71 | Add to Reading ListSource URL: www.steelnet.orgLanguage: English - Date: 2011-06-06 00:30:16
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72 | Add to Reading ListSource URL: www.steelnet.orgLanguage: English - Date: 2013-07-01 10:59:41
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73 | Add to Reading ListSource URL: www.steelnet.orgLanguage: English - Date: 2011-03-27 18:19:04
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74 | Add to Reading ListSource URL: www.steelnet.orgLanguage: English - Date: 2013-08-22 15:56:11
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75 | Add to Reading ListSource URL: www.steelnet.orgLanguage: English - Date: 2013-12-19 14:24:37
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76 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-09-03 18:17:50
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77 | Add to Reading ListSource URL: 220.247.214.182Language: English - Date: 2014-03-27 00:33:16
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78 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2008-11-17 12:11:01
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79 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2014-04-30 15:10:18
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80 | Add to Reading ListSource URL: www.navigationdatacenter.usLanguage: English - Date: 2013-04-18 14:17:28
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