111 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 16:58:20
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112 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2005-11-01 09:20:18
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113 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2005-10-25 10:16:28
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114 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1998-11-13 10:26:39
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115 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2005-10-25 10:16:27
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116 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 16:57:51
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117 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2005-10-25 10:31:01
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118 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 16:58:09
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119 | Add to Reading ListSource URL: www.aapfco.orgLanguage: English - Date: 2013-08-30 16:39:49
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120 | Add to Reading ListSource URL: www.aapfco.orgLanguage: English - Date: 2013-08-30 16:43:23
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