31![](https://www.pdfsearch.io/img/fe47c49f3d03020220ac88d2cd3191e4.jpg) | Add to Reading ListSource URL: users.ox.ac.ukLanguage: English - Date: 2005-02-18 06:29:36
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32![](https://www.pdfsearch.io/img/531364f8851f6f41cddc1eb1c284ac24.jpg) | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-11-05 16:41:07
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33![](https://www.pdfsearch.io/img/c9c50d338656f8d0fb0d8c85c48e2ea6.jpg) | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-12-13 16:31:18
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34![](https://www.pdfsearch.io/img/dca0ff2daa8268781fc085ebad263911.jpg) | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-11-22 12:14:14
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35![](https://www.pdfsearch.io/img/1b1b5ec79348cfa7309ffc905afd8e6b.jpg) | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2001-03-26 10:29:45
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36![](https://www.pdfsearch.io/img/bf263073afd36ca13a2c060658930424.jpg) | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2001-08-21 09:48:45
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