41 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2016-07-13 17:26:25
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42 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2016-02-01 13:35:51
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43 | Add to Reading ListSource URL: www.kenyachambermines.comLanguage: English - Date: 2015-07-07 09:35:15
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44 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2015-09-08 13:24:40
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45 | Add to Reading ListSource URL: www.sustainableconcrete.org.ukLanguage: English - Date: 2016-01-18 05:38:29
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46 | Add to Reading ListSource URL: www.mineafrica.comLanguage: English - Date: 2014-10-28 17:17:05
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47 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2015-10-20 10:41:36
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48 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2015-11-30 15:51:31
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49 | Add to Reading ListSource URL: www.progeo.seLanguage: English - Date: 2011-04-25 10:35:18
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50 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2015-10-20 10:39:56
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