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1by Young, Duncan A.“...U.S. Geological Survey,...”
Published 2003
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2by Bleamaster, Leslie F.“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2005
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3Published 2002“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
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4by Lang, Nicholas P.“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2010
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5by Bannister, Roger A.“...U.S. Dept., of the Interior, U.S. Geological Survey,...”
Published 2010
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6by Hansen, Vicki L.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 2009
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7Published 2014“...U.S. Department of the Interior, U.S. Geological Survey,...”
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