571 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2012-11-05 11:35:32
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572 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-09-25 09:37:48
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573 | Add to Reading ListSource URL: phys.orgLanguage: English - Date: 2014-11-19 17:30:33
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574 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-09-25 12:37:26
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575 | Add to Reading ListSource URL: www.nyc.govLanguage: English - Date: 2011-10-13 14:05:56
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576 | Add to Reading ListSource URL: calval.cr.usgs.govLanguage: English - Date: 2010-03-29 12:11:11
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577 | Add to Reading ListSource URL: files.archivists.orgLanguage: English - Date: 2013-08-05 10:32:12
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578 | Add to Reading ListSource URL: www.sanborn.comLanguage: English - Date: 2014-02-21 12:16:30
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579 | Add to Reading ListSource URL: discovery.ucl.ac.ukLanguage: English - Date: 2008-11-18 06:01:15
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580 | Add to Reading ListSource URL: files.archivists.orgLanguage: English - Date: 2013-09-06 14:20:27
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