71 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1998-09-02 09:19:20
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72 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2003-02-11 14:06:20
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73 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-02-05 10:07:30
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74 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-03-30 09:49:42
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75 | Add to Reading ListSource URL: www.altadenahistoricalsociety.orgLanguage: English - Date: 2010-11-26 12:35:44
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76 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1998-02-26 08:36:17
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77 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-03-07 17:00:20
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78 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:07
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79 | Add to Reading ListSource URL: www.blm.govLanguage: English - Date: 2014-09-07 03:57:09
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80 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1997-03-07 09:15:59
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