141 | Add to Reading ListSource URL: geomag.usgs.govLanguage: English - Date: 2014-07-07 13:24:46
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142 | Add to Reading ListSource URL: mnspruce.ornl.govLanguage: English - Date: 2014-09-11 17:04:41
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143 | Add to Reading ListSource URL: www.physicscentral.orgLanguage: English - Date: 2008-04-11 15:30:13
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144 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 11:49:35
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145 | Add to Reading ListSource URL: s.campbellsci.comLanguage: English - Date: 2012-03-14 12:54:02
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146 | Add to Reading ListSource URL: stemak.orgLanguage: English - Date: 2011-09-29 17:33:20
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147 | Add to Reading ListSource URL: www.usc.eduLanguage: English - Date: 2013-04-13 17:39:20
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148 | Add to Reading ListSource URL: www.physique.usherbrooke.caLanguage: English - Date: 2013-09-12 20:39:18
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149 | Add to Reading ListSource URL: www.physique.usherbrooke.caLanguage: English - Date: 2013-09-12 20:39:06
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150 | Add to Reading ListSource URL: s.campbellsci.comLanguage: English - Date: 2012-11-05 13:27:20
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