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[Washington] : Mining Enforcement and Safety Administration, [1975]
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2.
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[Arlington, Va.] : U.S. Dept. of the Interior, Mining Enforcement and Safety Administration, 1977.
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[Washington] : U.S. Dept. of the Interior, Mining Enforcement and Safety Administration, [1975]
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4.
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Washington : U.S. Dept. of the Interior, Mining Enforcement and Safety Administration, 1976.
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5.
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[Washington : Mining Enforcement and Safety Administration, Technical Support], 1974.
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6.
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Washington : For sale by the Supt. of Docs., U.S. Govt. Print. Off., [1975?]
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7.
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Washington : US Government Printing Office, 1952-
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8.
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[Washington] : Mining Enforcement and Safety Administration, [1974]
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9.
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[Washington] : U.S. Dept. of the Interior, Mining Enforcement and Safety Administration : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1974.
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10.
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[Washington] : Mining Enforcement and Safety Administration, [1975]
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