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1by Flint, Lorraine E.“...U.S. Geological Survey :...”
Published 1990
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4by Savard, Charles S.“...U.S. Geological Survey,...”
Published 1998
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5by Boucher, Michelle S.“...U.S. Geological Survey,...”
Published 1994
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6by Geldon, Arthur L.“...U.S. Geological Survey,...”
Published 1996
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7
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8Published 1999“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
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9by Wood, David B.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1992
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10by Loskot, Carole L.“...U.S. Dept. of the Interior, U.S. Geological Survey :...”
Published 1992
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11by Boucher, Michelle S.“...U.S. Dept. of the Interior, U.S. Geological Survey :...”
Published 1994
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12by Gilmore, Thomas D.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1992
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13by Loskot, Carole L.“...U.S. Dept. of the Interior, U.S. Geological Survey :...”
Published 1993
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14by Geldon, Arthur L.“...U.S. Dept. of the Interior, U.S. Geological Survey :...”
Published 1996
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15by Plume, Russell W.“...U.S. Dept of the Interior, U.S. Geological Survey ;...”
Published 1996
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16by Taylor, Emily M.“...U.S. Dept. of the Interior, U.S. Geological Survey :...”
Published 1995
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17by Carr, Wilfred James, 1926-“...U.S. Dept. of the Interior, U.S. Geological Survey :...”
Published 1995
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18by Wood, David B.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1996
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19by Ciesnik, Marek S.“...U.S. Dept. of the Interior, U.S. Geological Survey :...”
Published 1995
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20by Geldon, Arthur L.“...U.S. Dept. of the Interior, U.S. Geological Survey :...”
Published 1997
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