51 | Add to Reading ListSource URL: www.progeo.seLanguage: English - Date: 2009-12-29 05:23:44
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52 | Add to Reading ListSource URL: acwi.govLanguage: English - Date: 2016-06-28 14:21:50
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53 | Add to Reading ListSource URL: www.ncgeolsoc.orgLanguage: English - Date: 2010-11-16 21:45:55
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54 | Add to Reading ListSource URL: tx.usgs.govLanguage: English - Date: 2015-11-30 07:56:06
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55 | Add to Reading ListSource URL: crustal.cr.usgs.govLanguage: English - Date: 2016-02-12 17:46:24
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56 | Add to Reading ListSource URL: datapreservation.usgs.govLanguage: English - Date: 2016-01-07 16:04:18
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57 | Add to Reading ListSource URL: www.eurogeosurveys.orgLanguage: English - Date: 2016-04-15 07:53:44
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58 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2016-01-28 17:49:39
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59 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2016-06-17 07:20:46
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60 | Add to Reading ListSource URL: datapreservation.usgs.govLanguage: English - Date: 2015-11-13 11:40:56
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