11 | Add to Reading ListSource URL: www.nichols.eduLanguage: English - Date: 2012-01-12 11:38:25
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12 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2014-07-15 12:28:50
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13 | Add to Reading ListSource URL: www.osepa.euLanguage: English - Date: 2012-03-22 08:05:19
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14 | Add to Reading ListSource URL: www.osepa.euLanguage: English - Date: 2012-03-15 05:52:32
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15 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 17:05:30
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16 | Add to Reading ListSource URL: www.healthybay.orgLanguage: English - Date: 2014-06-10 17:57:56
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17 | Add to Reading ListSource URL: www.environment-agency.gov.ukLanguage: English - Date: 2013-08-31 22:28:59
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18 | Add to Reading ListSource URL: canalrivertrust.org.ukLanguage: English - Date: 2013-03-14 12:00:40
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19 | Add to Reading ListSource URL: wdr.water.usgs.govLanguage: English - Date: 2007-11-24 17:57:22
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20 | Add to Reading ListSource URL: www.yorkarchaeology.co.ukLanguage: English - Date: 2008-05-08 05:21:37
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