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1Published 1984Subjects: “...Coal leases Colorado....”
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2Published 1915Subjects: “...Coal....”
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3Published 1914Subjects: “...Coal mines and mining....”
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4Published 1984Subjects: “...Coal leases Colorado....”
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5Published 1984Subjects: “...Coal leases Colorado....”
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6Published 1906Subjects: “...Coal....”
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7Published 1923Subjects: “...Coal mines and mining....”
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8Published 1925Subjects: “...Coal mines and mining....”
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9Published 1925Subjects: “...Coal mines and mining....”
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10Published 1914Subjects: “...Coal mines and mining Colorado....”
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11Published 1914Subjects: “...Coal mines and mining Colorado....”
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12Published 1914Subjects: “...Coal mines and mining Colorado....”
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13Published 1914Subjects: “...Coal mines and mining Colorado....”
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14Published 1914Subjects: “...Coal mines and mining Colorado....”
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15Published 1914Subjects: “...Coal mines and mining Colorado....”
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16Published 1914Subjects: “...Coal mines and mining Colorado....”
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17Published 1914Subjects: “...Coal mines and mining Colorado....”
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18Published 1915Subjects: “...Coal mines and mining....”
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19Published 1913Subjects: “...Coal mines and mining....”
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20Published 1913Subjects: “...Coal mines and mining....”
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