331 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-01-29 11:45:54
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332 | Add to Reading ListSource URL: www.uss-bennington.orgLanguage: English - Date: 2003-07-13 12:24:13
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333 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2010-01-27 09:50:08
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334 | Add to Reading ListSource URL: johnsonlaird.comLanguage: English - Date: 2012-11-25 22:03:26
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335 | Add to Reading ListSource URL: www.sheridancountynebraska.comLanguage: English - Date: 2012-04-18 04:09:58
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336 | Add to Reading ListSource URL: www.midamericanenergy.comLanguage: English - Date: 2007-08-07 10:11:21
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337 | Add to Reading ListSource URL: pdfhost.focus.nps.govLanguage: English - Date: 2008-03-18 03:18:10
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338 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1996-08-19 14:33:22
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339 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-09-26 07:38:52
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340 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-29 14:36:47
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