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1
1992 census of mineral industries.
Published: U.S. Dept. of Commerce, Economics and Statistics Administration, Bureau of the Census : For sale by Supt. of Docs., U.S. G.P.O., 1995Subjects: “…Coal mines and mining United States Statistics.…”
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Government Document Online Book -
2
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3
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4
7000-2 quarterly mine employment and coal production reporting
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5
The Miners' journal coal statistical register the coal statistics.
Online Journal -
6
Coal contractor mining facts
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7
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Coal operator mining facts
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Government Document Online Serial -
9
Coal and metal/nonmetal mining facts.
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Government Document Online Serial