231 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-10-31 06:59:53
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232 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1996-08-02 13:11:10
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233 | Add to Reading ListSource URL: www.airquality.utah.govLanguage: English - Date: 2014-05-09 16:06:06
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234 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-05-29 10:26:21
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235 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-05-18 14:10:46
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236 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 11:56:49
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237 | Add to Reading ListSource URL: www.deq.state.ok.usLanguage: English - Date: 2014-07-22 16:07:10
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238 | Add to Reading ListSource URL: www.ironsmith.ccLanguage: English - Date: 2013-03-25 19:38:36
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239 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2013-10-24 17:22:42
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240 | Add to Reading ListSource URL: www.anr.state.vt.usLanguage: English - Date: 2013-08-22 14:13:44
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