21 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-02-13 13:50:33
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22 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-03-07 15:19:03
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23 | Add to Reading ListSource URL: www.munseys.comLanguage: English - Date: 2007-03-21 19:48:31
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24 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-01-24 11:55:08
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25 | Add to Reading ListSource URL: materials.iisc.ernet.inLanguage: English - Date: 2004-10-20 04:54:24
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26 | Add to Reading ListSource URL: www.indianscience.orgLanguage: English - Date: 2006-04-04 00:49:01
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27 | Add to Reading ListSource URL: www.antigaarabia.comLanguage: English - Date: 2011-03-15 12:49:41
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28 | Add to Reading ListSource URL: www.worldsteel.orgLanguage: English |
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29 | Add to Reading ListSource URL: www.tyzack.netLanguage: English - Date: 2006-09-06 12:36:21
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30 | Add to Reading ListSource URL: www.crucible.comLanguage: English - Date: 2010-06-03 09:40:06
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