11 | Add to Reading ListSource URL: www.unawe.orgLanguage: English - Date: 2013-11-26 05:30:27
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12 | Add to Reading ListSource URL: www.edquest.caLanguage: English - Date: 2014-02-28 13:55:41
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13 | Add to Reading ListSource URL: www.willbell.comLanguage: English - Date: 2003-06-19 20:18:20
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14 | Add to Reading ListSource URL: www.willbell.comLanguage: English - Date: 2002-03-28 00:32:29
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15 | Add to Reading ListSource URL: www.willbell.comLanguage: English - Date: 2006-12-12 21:36:39
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16 | Add to Reading ListSource URL: web.archive.orgLanguage: English |
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17 | Add to Reading ListSource URL: www.covingtoninnovations.comLanguage: English - Date: 2004-05-08 16:48:35
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18 | Add to Reading ListSource URL: www.as.utexas.eduLanguage: English - Date: 2008-04-03 16:07:40
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19 | Add to Reading ListSource URL: www.astronomy.org.ggLanguage: English - Date: 2009-07-19 09:51:58
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20 | Add to Reading ListSource URL: www.astronomy.swin.edu.auLanguage: English - Date: 2010-01-15 01:57:04
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