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1by Hudson, Mark R.“...U.S. Geological Survey,...”
Published 2007
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2Published 1983“...U.S. Geological Survey,...”
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4by Hudson, Mark R.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 2004
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5Published 2016“...U.S. Department of the Interior, U.S. Geological Survey,...”
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6Published 2018“...U.S. Department of the Interior, U.S. Geological Survey,...”
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