21 | Add to Reading ListSource URL: www.columbia.eduLanguage: English - Date: 2014-07-14 15:28:42
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22 | Add to Reading ListSource URL: www.columbia.eduLanguage: English - Date: 2014-07-14 15:44:08
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23 | Add to Reading ListSource URL: www.nga.govLanguage: English - Date: 2013-02-08 12:33:17
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24 | Add to Reading ListSource URL: press.uchicago.eduLanguage: English - Date: 2014-08-05 16:01:40
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25 | Add to Reading ListSource URL: www.nga.govLanguage: English - Date: 2013-08-15 15:07:54
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26 | Add to Reading ListSource URL: pdf.oac.cdlib.orgLanguage: English - Date: 2014-10-05 23:21:42
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27 | Add to Reading ListSource URL: oklahomatoday.comLanguage: English - Date: 2011-07-02 19:19:17
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28 | Add to Reading ListSource URL: www.oklahomatoday.comLanguage: English - Date: 2011-07-02 19:19:17
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29 | Add to Reading ListSource URL: www.nga.govLanguage: English - Date: 2014-08-21 20:04:55
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30 | Add to Reading ListSource URL: www.nga.govLanguage: English - Date: 2013-06-07 12:07:47
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