131 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2005-01-12 10:45:07
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132 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-03-07 14:13:41
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133 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-03-07 15:19:03
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134 | Add to Reading ListSource URL: www.sustainableconcrete.org.ukLanguage: English - Date: 2013-10-03 08:40:54
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135 | Add to Reading ListSource URL: www.ifrf.netLanguage: English - Date: 2013-06-10 03:48:37
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136 | Add to Reading ListSource URL: www.edragonfire.comLanguage: English - Date: 2012-12-15 23:58:18
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137 | Add to Reading ListSource URL: www.smecc.orgLanguage: English - Date: 2010-10-09 14:27:20
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138 | Add to Reading ListSource URL: research.microsoft.comLanguage: English - Date: 2011-06-15 12:13:41
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