31 | Add to Reading ListSource URL: acwi.govLanguage: English - Date: 2004-08-25 11:18:17
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32 | Add to Reading ListSource URL: www.nps.govLanguage: English - Date: 2008-10-09 11:52:03
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33 | Add to Reading ListSource URL: www.nps.govLanguage: English - Date: 2012-05-18 16:41:39
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34 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English |
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35 | Add to Reading ListSource URL: acwi.govLanguage: English - Date: 2004-08-25 09:15:36
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36 | Add to Reading ListSource URL: acwi.govLanguage: English - Date: 2004-08-25 15:11:27
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37 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-04-26 16:23:36
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38 | Add to Reading ListSource URL: www.nps.govLanguage: English - Date: 2010-10-22 09:49:58
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39 | Add to Reading ListSource URL: ia.water.usgs.govLanguage: English - Date: 2014-07-16 14:32:29
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40 | Add to Reading ListSource URL: kgs.uky.eduLanguage: English - Date: 2001-10-22 13:56:18
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