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1Published 1991“...U.S. Geological Survey ;...”
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2by Peltz, Lorri A. (Lorri Ann), 1959-“...U.S. Geological Survey ;...”
Published 1991
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3by Butler, David L. (David Louis), 1946-“...U.S. Geological Survey,...”
Published 1996
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5by Hoffman, Ray J.“...U.S. Geological Survey,...”
Published 1994
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10by Mueller, David K.“...U.S. Geological Survey,...”
Published 1991
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12by See, Randolph B.“...U.S. Geological Survey,...”
Published 1992
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13by Dileanis, Peter D.“...U.S. Geological Survey,...”
Published 1992
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16by Hoffman, Ray J.“...U.S. Geological Survey,...”
Published 1990
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20by Butler, David L. (David Louis), 1946-“...U.S. Geological Survey,...”
Published 1991
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