21 | Add to Reading ListSource URL: www.manhattan-institute.orgLanguage: English - Date: 2013-05-06 11:44:33
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22 | Add to Reading ListSource URL: azgs.az.govLanguage: English - Date: 2011-10-05 02:06:01
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23 | Add to Reading ListSource URL: www.usc.eduLanguage: English - Date: 2013-04-13 17:33:08
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24 | Add to Reading ListSource URL: www.gao.govLanguage: English - Date: 2011-09-29 19:19:51
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25 | Add to Reading ListSource URL: www.tja.eeLanguage: English - Date: 2010-09-24 02:27:36
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26 | Add to Reading ListSource URL: www.nasa.govLanguage: English - Date: 2013-06-26 23:20:51
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27 | Add to Reading ListSource URL: www.wcb.nt.caLanguage: English - Date: 2010-08-13 14:02:55
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28 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-07-18 18:12:51
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29 | Add to Reading ListSource URL: www.azgs.az.govLanguage: English - Date: 2011-10-05 02:06:01
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30 | Add to Reading ListSource URL: ntrs.nasa.govLanguage: English - Date: 2013-04-10 16:29:57
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