51 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2007-05-01 12:42:38
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52 | Add to Reading ListSource URL: emtoolbox.nist.govLanguage: English - Date: 2002-10-15 10:12:26
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53 | Add to Reading ListSource URL: www.dot.state.mn.usLanguage: English - Date: 2012-01-04 09:19:18
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54 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-07-21 13:25:56
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55 | Add to Reading ListSource URL: www.hou.usra.eduLanguage: English - Date: 2014-06-20 19:04:06
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56 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2004-02-25 16:57:22
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57 | Add to Reading ListSource URL: www.lpi.usra.eduLanguage: English - Date: 2009-01-08 14:52:41
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58 | Add to Reading ListSource URL: www.sdgs.usd.eduLanguage: English - Date: 2014-03-24 12:20:46
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59 | Add to Reading ListSource URL: woodshole.er.usgs.govLanguage: English - Date: 2014-02-11 16:51:42
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60 | Add to Reading ListSource URL: vtransengineering.vermont.govLanguage: English - Date: 2012-08-24 14:57:08
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