31 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2011-01-27 15:22:39
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32 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-11-23 11:30:49
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33 | Add to Reading ListSource URL: www.minsocam.orgLanguage: English - Date: 2007-11-26 09:22:36
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34 | Add to Reading ListSource URL: www.minsocam.orgLanguage: English - Date: 2007-11-26 12:51:52
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35 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1996-09-04 07:15:14
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36 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-09-14 13:47:07
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37 | Add to Reading ListSource URL: www.dtsc.ca.govLanguage: English - Date: 2005-07-13 17:23:50
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38 | Add to Reading ListSource URL: www.australianminesatlas.gov.auLanguage: English - Date: 2011-12-11 19:03:06
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39 | Add to Reading ListSource URL: www.fs.usda.govLanguage: English - Date: 2010-02-18 15:24:33
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40 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-12-22 16:10:36
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