541 | Add to Reading ListSource URL: www.scienceinschool.orgLanguage: English - Date: 2014-10-07 06:42:05
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542 | Add to Reading ListSource URL: cosmocompcharmschool2013.strw.leidenuniv.nlLanguage: English - Date: 2013-05-23 06:52:22
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543 | Add to Reading ListSource URL: www.chem.uni-wuppertal.deLanguage: English - Date: 2014-09-26 11:54:46
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544 | Add to Reading ListSource URL: www.nextgenscience.orgLanguage: English - Date: 2013-05-16 11:45:06
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545 | Add to Reading ListSource URL: scienceworld.scholastic.comLanguage: English - Date: 2014-07-18 11:48:11
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546 | Add to Reading ListSource URL: arxiv.orgLanguage: English - Date: 2014-06-02 20:19:59
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547 | Add to Reading ListSource URL: phys.orgLanguage: English - Date: 2015-01-04 05:45:57
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548 | Add to Reading ListSource URL: www.columbia.eduLanguage: English - Date: 2012-12-20 18:23:35
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549 | Add to Reading ListSource URL: www.nasa.govLanguage: English - Date: 2013-04-30 20:36:28
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550 | Add to Reading ListSource URL: www.cfa.harvard.eduLanguage: English - Date: 2013-07-25 21:32:36
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