261 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-03-07 09:19:03
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262 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-09-04 14:34:43
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263 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-03-06 14:03:41
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264 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-01-13 09:12:44
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265 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1998-02-19 14:35:55
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266 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-10-03 06:48:49
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267 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-05-28 18:14:58
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268 | Add to Reading ListSource URL: web.uni-plovdiv.bgLanguage: English - Date: 2012-02-23 03:39:33
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269 | Add to Reading ListSource URL: elements.wlonk.comLanguage: English - Date: 2013-04-06 14:22:02
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270 | Add to Reading ListSource URL: firetrak.server267.comLanguage: English - Date: 2008-10-14 18:45:06
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