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1Published 1998“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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2by Grout, Marilyn A.“...U.S. Dept. of the Interior, U.S. Geological Survey :...”
Published 1992
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3Published 1992“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
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4by Johnson, Samuel Y.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1992
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5by Johnson, Ronald C. (Ronald Carl), 1950-“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1993
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6Published 2003“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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7Published 2002“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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8Published 2003“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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9Published 2009“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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10Published 2009“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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11Published 2010“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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12Published 2010“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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13by Johnson, Ronald C.“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2012
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14by Grout, Marilyn A.“...U.S. Dept. of the Interior, Geological Survey :...”
Published 1991
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