61 | Add to Reading ListSource URL: blogs.worldwatch.orgLanguage: English - Date: 2013-05-13 18:11:53
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62 | Add to Reading ListSource URL: www.pgeconomics.co.ukLanguage: English - Date: 2011-07-05 05:50:37
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63 | Add to Reading ListSource URL: www.footprintnetwork.orgLanguage: English - Date: 2012-05-10 13:52:17
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64 | Add to Reading ListSource URL: www.footprintnetwork.orgLanguage: English - Date: 2013-02-04 20:28:07
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65 | Add to Reading ListSource URL: www.isa.org.usyd.edu.auLanguage: English - Date: 2009-10-25 18:34:03
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66 | Add to Reading ListSource URL: www.rshanthini.comLanguage: English - Date: 2009-06-16 00:46:23
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67 | Add to Reading ListSource URL: assets.panda.orgLanguage: English - Date: 2008-10-27 11:35:00
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