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Bulletin - United States Geological Survey, Volumes 128-134
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Bulletin of the United States Geological Survey, Issues 168-172
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Bulletin of the United States Geological Survey, Issues 121-122
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Bulletin - United States Geological Survey, Volumes 151-152
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Bulletin of the United States Geological Survey, Issues 31-36
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Water-Supply and Irrigation Papers of the United States Geological Surve...
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Water-Supply and Irrigation Papers of the United States Geological Surve...
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Water-Supply and Irrigation Papers of the United States Geological Surve...
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Bulletin - United States Geological Survey, Volumes 32-38

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