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Subjects
Coal mines and mining, Geology, Mine roof control, Coal, Safety measures, Mine drainage, Mine water, Pennsylvania, Rock bursts, Ground control (Mining), Landsat satellites, Measurement, Mine roof bolting, Mine subsidences, Mine timbering, Mining geology, Quarries and quarrying, Remote sensing, Slate, Stratigraphic Geology, TalcPlaces
Pennsylvania, Appalachian Region, Georgia, Ohio Valley region, Pen Argyl Region, Pittsburgh, Pocahontas County, Virginia, West VirginiaID Numbers
- OLID: OL767766A
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August 24, 2008 | Edited by RenameBot | fix author name |
April 1, 2008 | Created by an anonymous user | initial import |