271 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-09-14 10:07:18
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272 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2001-07-27 09:35:27
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273 | Add to Reading ListSource URL: www.consrv.ca.govLanguage: English - Date: 2014-04-28 20:15:53
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274 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2009-04-13 15:56:03
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275 | Add to Reading ListSource URL: epa.govLanguage: English - Date: 2014-03-11 13:38:48
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276 | Add to Reading ListSource URL: dawn.jpl.nasa.govLanguage: English - Date: 2012-04-18 18:52:51
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277 | Add to Reading ListSource URL: www.maine.govLanguage: English - Date: 2013-07-26 10:00:12
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278 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2007-06-07 16:59:19
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279 | Add to Reading ListSource URL: ec.europa.euLanguage: English - Date: 2012-10-18 12:26:27
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280 | Add to Reading ListSource URL: ec.europa.euLanguage: English - Date: 2012-03-20 14:37:55
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