51![](https://www.pdfsearch.io/img/ce324cf8ebdab36c63ff02c4d5021293.jpg) | Add to Reading ListSource URL: www.handbookofmineralogy.comLanguage: English - Date: 2007-09-30 02:32:10
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52![](https://www.pdfsearch.io/img/50ddb6ae75f5ddcf8bb408a6af824fd5.jpg) | Add to Reading ListSource URL: www.fs.fed.usLanguage: English - Date: 2010-07-26 09:40:16
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53![](https://www.pdfsearch.io/img/421abca0c38742ea2adcf54aa5bee795.jpg) | Add to Reading ListSource URL: www.fs.usda.govLanguage: English - Date: 2009-07-16 23:32:12
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54![](https://www.pdfsearch.io/img/fc7d718faf4256a19a7e7073b7d424a4.jpg) | Add to Reading ListSource URL: www.handbookofmineralogy.comLanguage: English - Date: 2007-09-30 01:11:30
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55![](https://www.pdfsearch.io/img/20c0f5c57c4aa3039b694b84a6fdf9a2.jpg) | Add to Reading ListSource URL: www.caves.orgLanguage: English - Date: 2007-10-23 22:54:30
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56![](https://www.pdfsearch.io/img/bbbdd93de2b2da9fdf3049370ce2e303.jpg) | Add to Reading ListSource URL: www.caves.orgLanguage: English - Date: 2008-03-06 13:32:20
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57![](https://www.pdfsearch.io/img/face850f23ec02637aee0c1f72a6f1fc.jpg) | Add to Reading ListSource URL: hbs.bishopmuseum.orgLanguage: English - Date: 2007-07-02 06:00:00
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58![](https://www.pdfsearch.io/img/40be2e34476e20800f7e07925314d85e.jpg) | Add to Reading ListSource URL: www.cosis.netLanguage: English - Date: 2005-01-19 06:47:53
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