31 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-10-02 15:47:10
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32 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-09-23 16:02:35
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33 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2014-09-25 17:05:23
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34 | Add to Reading ListSource URL: www.health.state.mn.usLanguage: English - Date: 2014-10-14 13:02:34
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35 | Add to Reading ListSource URL: waterquality.cce.cornell.eduLanguage: English - Date: 2010-01-28 16:06:41
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36 | Add to Reading ListSource URL: www.clu-in.orgLanguage: English - Date: 2007-08-23 09:17:48
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37 | Add to Reading ListSource URL: waterquality.cce.cornell.eduLanguage: English - Date: 2010-01-28 16:06:41
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38 | Add to Reading ListSource URL: epa.govLanguage: English - Date: 2014-08-06 16:06:59
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39 | Add to Reading ListSource URL: fisheries.tamu.eduLanguage: English - Date: 2013-11-14 15:08:14
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40 | Add to Reading ListSource URL: www.dep.state.fl.usLanguage: English - Date: 2010-04-22 12:31:48
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