1 | Add to Reading ListSource URL: www.dcnr.state.pa.usLanguage: English - Date: 2013-02-04 11:31:58
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2 | Add to Reading ListSource URL: www.oilheritage.orgLanguage: English - Date: 2005-07-01 14:30:08
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3 | Add to Reading ListSource URL: www.oilheritage.orgLanguage: English - Date: 2006-02-14 15:14:13
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4 | Add to Reading ListSource URL: www.dcnr.state.pa.usLanguage: English - Date: 2013-06-25 08:33:17
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5 | Add to Reading ListSource URL: www.drakewell.orgLanguage: English - Date: 2012-07-06 10:35:39
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6 | Add to Reading ListSource URL: www.drakewell.orgLanguage: English - Date: 2010-11-10 10:16:22
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7 | Add to Reading ListSource URL: esa21.kennesaw.eduLanguage: English - Date: 2008-04-16 07:35:47
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8 | Add to Reading ListSource URL: www.dcnr.state.pa.usLanguage: English - Date: 2013-06-04 10:39:49
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9 | Add to Reading ListSource URL: www.tcda.orgLanguage: English - Date: 2014-05-14 14:50:22
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