471![](https://www.pdfsearch.io/img/f5edafe26e7b5f721881bc00737d7b1a.jpg) | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:44
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472![](https://www.pdfsearch.io/img/d67f872ccc556c4f11b8f3174c31b8ae.jpg) | Add to Reading ListSource URL: pdfhost.focus.nps.govLanguage: English - Date: 2008-03-18 03:19:24
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473![](https://www.pdfsearch.io/img/8afca4c254d92e6296d82aa6b116762c.jpg) | Add to Reading ListSource URL: pdfhost.focus.nps.govLanguage: English - Date: 2008-03-07 04:43:06
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474![](https://www.pdfsearch.io/img/67160b19edd8cab84d1eba5bac684451.jpg) | Add to Reading ListSource URL: emml.mtu.eduLanguage: English |
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475![](https://www.pdfsearch.io/img/af5e5df806757a8a715dec6bf4dcd027.jpg) | Add to Reading ListSource URL: www.keweenawlandtrust.orgLanguage: English - Date: 2008-05-06 17:24:39
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476![](https://www.pdfsearch.io/img/105b1ff3e35b5b27a46302b752ec2292.jpg) | Add to Reading ListSource URL: www.handbookofmineralogy.comLanguage: English - Date: 2007-09-30 01:12:16
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477![](https://www.pdfsearch.io/img/53825b25c81582639a7a4f7231449f5f.jpg) | Add to Reading ListSource URL: www.fs.fed.usLanguage: English - Date: 2007-09-21 12:17:52
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478![](https://www.pdfsearch.io/img/be48558d77aa7e1ed49f1e6ac102fde8.jpg) | Add to Reading ListSource URL: www.cityofhoughton.comLanguage: English - Date: 2008-05-26 11:01:22
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479![](https://www.pdfsearch.io/img/42aae17dedb46630b60aa6c7cae680b1.jpg) | Add to Reading ListSource URL: www.houghtoncounty.netLanguage: English - Date: 2012-07-31 10:15:27
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480![](https://www.pdfsearch.io/img/c4978a27950c3bb7b06f9ed29bc545af.jpg) | Add to Reading ListSource URL: upeda.comLanguage: English - Date: 2011-01-12 14:28:10
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