11 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-06-19 11:45:24
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12 | Add to Reading ListSource URL: www.mde.state.md.usLanguage: English - Date: 2015-02-19 03:29:11
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13 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 16:56:33
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14 | Add to Reading ListSource URL: www.dfo-mpo.gc.caLanguage: English - Date: 2011-09-29 07:59:03
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15 | Add to Reading ListSource URL: luoto.tvarminne.helsinki.fiLanguage: English - Date: 2014-03-07 02:37:42
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16 | Add to Reading ListSource URL: ia700309.us.archive.orgLanguage: English - Date: 2009-11-20 15:10:24
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17 | Add to Reading ListSource URL: www.int-res.comLanguage: English - Date: 2007-01-05 05:45:54
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