221 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2002-09-19 14:50:58
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222 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1996-11-05 15:00:10
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223 | Add to Reading ListSource URL: www.elfm.euLanguage: English - Date: 2013-11-12 09:40:05
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224 | Add to Reading ListSource URL: www.frackfreeeastyorkshire.comLanguage: English - Date: 2015-05-28 04:56:30
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225 | Add to Reading ListSource URL: www.aviarampatzis.comLanguage: English - Date: 2014-09-10 05:52:53
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226 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1998-11-30 09:23:57
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227 | Add to Reading ListSource URL: www.powerpastcoal.orgLanguage: English - Date: 2011-08-29 12:31:44
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228 | Add to Reading ListSource URL: www.mcdan.comLanguage: English - Date: 2015-07-13 15:25:32
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229 | Add to Reading ListSource URL: www.coalassociation.orgLanguage: English - Date: 2008-06-24 22:19:00
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230 | Add to Reading ListSource URL: www.coalassociation.orgLanguage: English - Date: 2013-02-21 18:49:00
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