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81by German, E. R.“...U.S. Geological Survey,...”
Published 1996
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83by Murray, Mitchell H.“...U.S. Geological Survey,...”
Published 1998
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84by Orem, William H. (William Henry)“...U.S. Geological Survey,...”
Published 1996
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85by Levesque, Victor A.“...U.S. Geological Survey,...”
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86by Aiken, George R., 1951-“...U.S. Geological Survey,...”
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88by Van Metre, Peter“...U.S. Geological Survey,...”
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89by Liu, Hsi-Ping“...U.S. Geological Survey,...”
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90by Elder, John F.“...U.S. Geological Survey,...”
Published 1996
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91by LaHusen, Richard G.“...U.S. Geological Survey,...”
Published 1996
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93Published 2004“...U.S. Geological Survey,...”
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94by Elliott, John G. (John Grant), 1951-“...U.S. Geological Survey,...”
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96by Maurer, Douglas K.“...U.S. Geological Survey,...”
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97by Milici, Robert C., 1931-“...U.S. Geological Survey,...”
Published 1997
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98by O'Connor, Jim E., 1959-“...U.S. Geological Survey,...”
Published 2004
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99by Breault, Robert F.“...U.S. Geological Survey,...”
Published 2004
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