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vagel c keller
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Underground coal mining in Western Maryland, 1876-1977
Vagel C. Keller · Lewis J. Ort Library, Frostburg State University
462 sayfa · 2008
Coal mines and mining / History
Coal company index
Vagel C. Keller, Virginia R. Williams · Lewis J. Ort Library, Frostburg State University
98 sayfa · 2009
Coal mines and mining / Indexes / History