191 | Add to Reading ListSource URL: homepages.spa.umn.eduLanguage: English - Date: 2004-09-11 13:09:01
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192 | Add to Reading ListSource URL: zpower.comLanguage: English - Date: 2012-05-02 21:02:48
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193 | Add to Reading ListSource URL: www.fas.orgLanguage: English - Date: 2005-04-06 13:41:42
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194 | Add to Reading ListSource URL: www.earthtech.orgLanguage: English - Date: 2012-01-25 17:28:40
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195 | Add to Reading ListSource URL: nobelprize.orgLanguage: English |
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196 | Add to Reading ListSource URL: www.fisica.unipa.itLanguage: English - Date: 2007-06-19 06:47:12
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