51 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-06-13 09:53:34
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52 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-10-06 14:16:46
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53 | Add to Reading ListSource URL: www.conservation.ca.govLanguage: English - Date: 2014-04-28 20:15:52
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54 | Add to Reading ListSource URL: www.consrv.ca.govLanguage: English - Date: 2014-04-28 20:15:52
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55 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1998-04-08 12:26:42
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56 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-11-21 13:22:00
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57 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-02-25 10:13:05
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58 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-01-31 12:36:00
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59 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-03-08 13:01:26
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60 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-04-11 14:40:12
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