21 | Add to Reading ListSource URL: www.nist.govLanguage: English - Date: 2011-08-11 16:21:01
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22 | Add to Reading ListSource URL: www.nist.govLanguage: English - Date: 2011-09-21 16:01:49
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23 | Add to Reading ListSource URL: www.nist.govLanguage: English - Date: 2010-10-19 11:20:02
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24 | Add to Reading ListSource URL: www.nist.govLanguage: English - Date: 2012-11-14 20:51:24
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25 | Add to Reading ListSource URL: www.nist.govLanguage: English - Date: 2011-08-11 16:21:26
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26 | Add to Reading ListSource URL: www.nist.govLanguage: English - Date: 2010-10-18 16:49:09
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27 | Add to Reading ListSource URL: www.nist.govLanguage: English - Date: 2011-10-25 12:07:30
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28 | Add to Reading ListSource URL: www.nist.govLanguage: English - Date: 2012-11-14 20:46:46
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29 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-10-05 10:33:06
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30 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-10-05 11:54:21
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