41 | Add to Reading ListSource URL: calwater.ca.govLanguage: English - Date: 2010-06-24 22:45:57
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42 | Add to Reading ListSource URL: www.science.calwater.ca.govLanguage: English - Date: 2010-06-24 22:58:19
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43 | Add to Reading ListSource URL: water.epa.govLanguage: English - Date: 2011-09-10 01:45:53
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44 | Add to Reading ListSource URL: hc-sc.gc.caLanguage: French - Date: 2013-07-09 12:17:04
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45 | Add to Reading ListSource URL: hc-sc.gc.caLanguage: English - Date: 2013-07-09 12:17:04
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46 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1997-03-03 08:37:19
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47 | Add to Reading ListSource URL: www.wuc.on.caLanguage: English - Date: 2014-03-06 09:31:37
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48 | Add to Reading ListSource URL: www.health.ny.govLanguage: English - Date: 2007-03-02 14:53:48
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49 | Add to Reading ListSource URL: mast.isLanguage: English - Date: 2012-04-20 13:02:23
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50 | Add to Reading ListSource URL: water.epa.govLanguage: English - Date: 2011-09-10 15:20:53
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