51 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1996-07-15 09:29:42
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52 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1998-07-16 08:47:45
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53 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2000-12-18 10:43:32
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54 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1996-11-05 14:59:56
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55 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2000-02-15 10:40:16
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56 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2001-01-16 08:38:25
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57 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1998-12-01 07:32:28
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58 | Add to Reading ListSource URL: www.bigdandme.com- Date: 2011-09-20 22:13:14
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59 | Add to Reading ListSource URL: festivalnet.comLanguage: English - Date: 2015-03-12 12:18:14
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60 | Add to Reading ListSource URL: www.subsurfaceconstructors.comLanguage: English - Date: 2010-08-11 15:38:06
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