111 | Add to Reading ListSource URL: profile.usgs.govLanguage: English - Date: 2012-06-25 18:19:54
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112 | Add to Reading ListSource URL: www.michigan.govLanguage: English - Date: 2012-12-18 16:25:36
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113 | Add to Reading ListSource URL: www.crjc.orgLanguage: English - Date: 2012-06-18 10:22:44
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114 | Add to Reading ListSource URL: geomag.usgs.govLanguage: English - Date: 2014-07-07 13:24:46
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115 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2011-09-16 10:58:07
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116 | Add to Reading ListSource URL: sec.gsfc.nasa.govLanguage: English - Date: 2005-01-27 15:07:01
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117 | Add to Reading ListSource URL: www.pewsocialtrends.orgLanguage: English - Date: 2010-11-11 15:27:24
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118 | Add to Reading ListSource URL: www.pewsocialtrends.orgLanguage: English - Date: 2010-11-11 15:27:24
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119 | Add to Reading ListSource URL: public.cranfield.ac.ukLanguage: English - Date: 2013-10-02 07:51:20
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120 | Add to Reading ListSource URL: www.enterprisesurveys.orgLanguage: English - Date: 2011-11-02 18:25:56
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