161 | Add to Reading ListSource URL: www.cbe.ab.caLanguage: English - Date: 2005-10-31 16:06:41
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162 | Add to Reading ListSource URL: www.phystec.orgLanguage: English - Date: 2014-07-28 22:34:05
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163 | Add to Reading ListSource URL: www.aapt.orgLanguage: English - Date: 2013-05-24 09:26:23
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164 | Add to Reading ListSource URL: www.aapt.orgLanguage: English - Date: 2010-08-17 17:28:53
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165 | Add to Reading ListSource URL: www.aapt.orgLanguage: English - Date: 2013-12-11 08:36:01
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166 | Add to Reading ListSource URL: sciencespin-2.scholastic.comLanguage: English - Date: 2014-02-12 08:53:34
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167 | Add to Reading ListSource URL: cosmictimes.gsfc.nasa.govLanguage: English - Date: 2014-05-15 13:52:03
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168 | Add to Reading ListSource URL: www.aapt.orgLanguage: English - Date: 2010-08-17 16:19:57
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169 | Add to Reading ListSource URL: umanitoba.caLanguage: English - Date: 2014-09-10 17:52:53
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170 | Add to Reading ListSource URL: www.smv.orgLanguage: English - Date: 2012-09-20 16:41:56
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