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1Published 1956Subjects: “...Coal Research United States....”
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3Published 1980Subjects: “...Coal Research United States Finance....”
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4Published 1980Subjects: “...Anthracite coal Research United States....”
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5Published 1991Subjects: “...Coal Research United States....”
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6Published 1976Subjects: “...Coal Research United States....”
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7by Vorres, Karl Spyros, 1937-Subjects: “...Coal Research United States Handbooks, manuals, etc....”
Published 1993
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8by Rolan, Robert G.Subjects: “...Coal Research United States....”
Published 1977
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9Published 1976Subjects: “...Coal Research United States....”
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10Published 1977Subjects: “...Coal Research United States....”
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11Published 1982Subjects: “...Coal Research United States....”
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12Published 2007Subjects: “...Coal Research United States....”
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13Subjects: “...Coal Research United States....”
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14
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15by Wells, Jim, 1947-Subjects: “...Coal Research United States....”
Published 2001
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16Published 1957Subjects: “...Coal Research United States....”
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17Published 1957Subjects: “...Coal Research United States....”
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18Published 1975Subjects: “...Coal Research United States....”
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20
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