21 | Add to Reading ListSource URL: www.tendercorp.comLanguage: English - Date: 2012-07-23 00:00:00
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22 | Add to Reading ListSource URL: www.sil.si.eduLanguage: English - Date: 2010-02-16 18:15:32
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23 | Add to Reading ListSource URL: www.historyoftechnology.orgLanguage: English - Date: 2013-01-31 15:19:42
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24 | Add to Reading ListSource URL: www.historyofscience.comLanguage: English - Date: 2008-10-20 20:24:35
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25 | Add to Reading ListSource URL: www.historyofscience.comLanguage: English - Date: 2009-07-31 16:46:37
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26 | Add to Reading ListSource URL: www.sil.si.eduLanguage: English - Date: 2002-11-12 10:54:52
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27 | Add to Reading ListSource URL: www.aps.orgLanguage: English - Date: 2009-05-27 11:38:56
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28 | Add to Reading ListSource URL: www.aps.orgLanguage: English - Date: 2009-05-26 15:24:55
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29 | Add to Reading ListSource URL: www.sil.si.eduLanguage: English - Date: 2008-05-27 13:03:53
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30 | Add to Reading ListSource URL: www.sil.si.eduLanguage: English - Date: 1999-07-28 16:21:36
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