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1Published 2000“...The Survey,...”
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2Published 1991“...U.S. Geological Survey ;...”
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3by Peltz, Lorri A. (Lorri Ann), 1959-“...U.S. Geological Survey ;...”
Published 1991
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4by Butler, David L. (David Louis), 1946-“...U.S. Geological Survey,...”
Published 1996
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6by Hoffman, Ray J.“...U.S. Geological Survey,...”
Published 1994
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11by Mueller, David K.“...U.S. Geological Survey,...”
Published 1991
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13by See, Randolph B.“...U.S. Geological Survey,...”
Published 1992
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14by Dileanis, Peter D.“...U.S. Geological Survey,...”
Published 1992
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17by Hoffman, Ray J.“...U.S. Geological Survey,...”
Published 1990
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