11 | Add to Reading ListSource URL: www.niagarariverregion.comLanguage: English - Date: 2014-10-21 10:19:49
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12 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2003-02-10 10:48:16
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13 | Add to Reading ListSource URL: www.blm.govLanguage: English - Date: 2013-05-06 16:25:51
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14 | Add to Reading ListSource URL: www.gov.mb.ca- Date: 2014-06-18 10:14:55
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15 | Add to Reading ListSource URL: www.gypa.orgLanguage: English - Date: 2012-08-08 11:49:41
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16 | Add to Reading ListSource URL: nature.nps.govLanguage: English - Date: 2008-12-08 16:45:12
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17 | Add to Reading ListSource URL: libraries.vermont.govLanguage: English - Date: 2011-06-08 15:58:15
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18 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 17:06:08
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19 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 17:06:17
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20 | Add to Reading ListSource URL: www.usbr.govLanguage: English - Date: 2013-10-30 11:39:07
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