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Surface water supply of the United States, 1951, Part V, Hudson Bay and upper Mississippi River basins [PDF]
U.S. Geological Survey
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The Popuration, Function and Boundary of the Urban Settlements in the United States
Kikukazu Doi
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Surface water supply of the United States, 1950, Part III, Ohio River basin [PDF]
U.S. Geological Survey
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Abbreviations used in publications of the United States Geological Survey [PDF]
U.S. Geological Survey
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Handbook of Frogs and Toads of the United States and Canada
H. T. Gaige+2 more
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Water levels and artesian pressures in observation wells in the United States, 1950, Part 2, Southeastern States [PDF]
U.S. Geological Survey
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