161 | Add to Reading ListSource URL: www.nps.govLanguage: English - Date: 2014-05-29 09:40:00
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162 | Add to Reading ListSource URL: www.nps.govLanguage: English - Date: 2014-06-25 10:58:57
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163 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-07-20 10:10:30
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164 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-02-27 14:55:08
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165 | Add to Reading ListSource URL: www.nps.govLanguage: English - Date: 2010-11-02 10:19:04
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166 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-12-17 14:55:12
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167 | Add to Reading ListSource URL: www.nps.govLanguage: English - Date: 2012-06-21 16:03:16
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168 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2010-08-16 14:55:18
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169 | Add to Reading ListSource URL: www.nps.govLanguage: English - Date: 2010-09-08 10:17:05
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170 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-07-25 15:27:28
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