681 | Add to Reading ListSource URL: calval.cr.usgs.govLanguage: English - Date: 2016-04-28 12:14:51
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682 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2015-04-17 15:28:13
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683 | Add to Reading ListSource URL: nationalmap.govLanguage: English - Date: 2013-10-22 12:06:54
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684 | Add to Reading ListSource URL: nehrp.govLanguage: English - Date: 2016-04-13 11:49:31
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685 | Add to Reading ListSource URL: md.water.usgs.govLanguage: English - Date: 2016-08-10 16:12:57
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686 | Add to Reading ListSource URL: mapcontext.comLanguage: English - Date: 2008-08-29 23:51:22
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687 | Add to Reading ListSource URL: watercenter.unl.eduLanguage: English - Date: 2010-10-13 15:01:10
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688 | Add to Reading ListSource URL: dhr.virginia.govLanguage: English - Date: 2012-08-03 12:30:23
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689 | Add to Reading ListSource URL: tidalmarshmonitoring.orgLanguage: English - Date: 2012-06-27 15:24:51
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690 | Add to Reading ListSource URL: goldengate.ce.caltech.eduLanguage: English - Date: 2011-03-10 18:06:55
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