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81by Hansen, Cristi V.“...U.S. Geological Survey,...”
Published 1991
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82by Perry, Charles A.“...U.S. Geological Survey,...”
Published 1990
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83by Spruill, T. B.“...U.S. Geological Survey,...”
Published 1990
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84
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85by Perry, Charles A.“...U.S. Geological Survey,...”
Published 1991
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86by Mueller, David K.“...U.S. Geological Survey,...”
Published 1991
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87
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88
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89
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90by Bevans, Hugh E.“...U.S. Geological Survey,...”
Published 1989
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91by Spruill, T. B.“...U.S. Geological Survey,...”
Published 1990
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92
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93
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94by Bevans, Hugh E.“...U.S. Geological Survey,...”
Published 1982
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95
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96by Clement, Ralph W.“...U.S. Geological Survey,...”
Published 1982
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97
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98
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99by Putnam, James E.“...U.S. Geological Survey,...”
Published 1997
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100by Kastner, William M.“...U.S. Geological Survey,...”
Published 1974
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