21 | Add to Reading ListSource URL: toxics.usgs.govLanguage: English - Date: 2001-07-09 17:23:40
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22 | Add to Reading ListSource URL: www.cwam.ucdavis.eduLanguage: English - Date: 2005-01-10 14:51:54
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23 | Add to Reading ListSource URL: linux1.ogm.utah.govLanguage: English - Date: 2010-04-26 14:24:10
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24 | Add to Reading ListSource URL: www.tips.osmre.govLanguage: English - Date: 2004-12-29 14:52:28
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25 | Add to Reading ListSource URL: mining.state.co.usLanguage: English - Date: 2014-05-27 11:44:29
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26 | Add to Reading ListSource URL: www.cluin.orgLanguage: English - Date: 2003-09-26 10:57:25
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27 | Add to Reading ListSource URL: 2009.treatminewater.comLanguage: English - Date: 2009-07-28 14:51:37
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28 | Add to Reading ListSource URL: www.newpa.comLanguage: English - Date: 2014-03-05 14:18:29
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29 | Add to Reading ListSource URL: www.pghminingreclamationconf.comLanguage: English - Date: 2010-02-24 20:59:30
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30 | Add to Reading ListSource URL: www.schuylkillwaters.orgLanguage: English - Date: 2009-03-18 09:31:52
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