11 | Add to Reading ListSource URL: unstats.un.orgLanguage: English - Date: 2007-03-15 15:05:35
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12 | Add to Reading ListSource URL: unstats.un.orgLanguage: English - Date: 2004-08-19 08:56:37
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13 | Add to Reading ListSource URL: unstats.un.orgLanguage: English - Date: 2013-12-17 11:26:25
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14 | Add to Reading ListSource URL: www.eia.govLanguage: English - Date: 2012-09-26 10:54:46
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15 | Add to Reading ListSource URL: www.nber.orgLanguage: English - Date: 2000-10-04 09:09:50
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16 | Add to Reading ListSource URL: www.nber.orgLanguage: English - Date: 2000-04-14 09:32:50
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17 | Add to Reading ListSource URL: mpra.ub.uni-muenchen.deLanguage: English - Date: 2013-02-19 08:13:57
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18 | Add to Reading ListSource URL: iecam.illinois.eduLanguage: English - Date: 2014-12-31 09:40:09
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19 | Add to Reading ListSource URL: iecam.illinois.eduLanguage: English - Date: 2014-12-31 09:35:33
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20 | Add to Reading ListSource URL: www.census.govLanguage: English - Date: 2009-12-10 10:16:39
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