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1Published 1998“...U.S. Dept. of the Interior, U.S. Geological Survey :...”
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2by Kuhn, Gerhard“...U.S. Dept. of the Interior, U.S. Geological Survey :...”
Published 1991
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3by Kuhn, Gerhard“...U.S. Dept. of the Interior, U.S. Geological Survey :...”
Published 1994
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4by Kuhn, Gerhard“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2003
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5by Kuhn, Gerhard“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2003
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6by Kuhn, Gerhard“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 2004
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7by Kuhn, Gerhard“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2006
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8by Kuhn, Gerhard“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2007
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9by Kuhn, Gerhard“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2005
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10by Kuhn, Gerhard“...U.S. Dept. of the Interior, Geological Survey,...”
Published 1983
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11by Kuhn, Gerhard“...Dept. of the Interior, U.S. Geological Survey :...”
Published 1988
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12by Kuhn, Gerhard“...Dept. of the Interior, U.S. Geological Survey :...”
Published 1988
Government Document Book