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Subjects
Coal mines and mining, Methane, Mine ventilationEdition | Availability |
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Drainage of methane from the overlying Pocahontas no. 4 coalbed from workings in the Pocahontas no. 3 coalbed
1979, Dept. of the Interior, Bureau of Mines
in English
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Edition Notes
Bibliography: p. 13.
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December 4, 2010 | Edited by Open Library Bot | Added subjects from MARC records. |
December 10, 2009 | Created by WorkBot | add works page |