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1“...U.S. Dept. of the Interior, Bureau of Mines....”
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2“...U.S. Dept. of the Interior, Bureau of Mines....”
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6“...U.S. Dept. of the Interior, Bureau of Mines....”
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7“...U.S. Dept. of the Interior, Bureau of Mines....”
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8“...U.S. Dept. of the Interior, Bureau of Mines....”
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9“...U.S. Dept. of the Interior, Bureau of Mines....”
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10“...U.S. Dept. of the Interior, Bureau of Mines....”
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11“...U.S. Dept. of the Interior, Bureau of Mines....”
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12“...U.S. Dept. of the Interior, Bureau of Mines....”
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13“...U.S. Dept. of the Interior, Bureau of Mines....”
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14“...U.S. Dept. of the Interior, Bureau of Mines....”
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15Published 1982“...U.S. Dept. of the Interior, Bureau of Mines,...”
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17“...U.S. Dept. of the Interior, Bureau of Mines....”
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18“...U.S. Dept. of the Interior, Bureau of Mines....”
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19“...U.S. Dept. of the Interior, Bureau of Mines....”
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20Published 1985“...U.S. Dept. of the Interior, Bureau of Mines,...”
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