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1Published 1998“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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2Published 1999“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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3Published 1998“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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4Published 2002“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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5Published 1996“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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8
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9
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12Published 1982“...U.S. Dept. of the Interior, Geological Survey,...”
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14Published 2002“...U.S. Dept. of the Interior, U.S. Geological Survey ; For additional copies, USGS Information...”
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