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Unstable Ground in Western North Dakota

Unstable Ground in Western North Dakota Distribution of Landslides and Subsidence in Western North Dakota, and Recognition of Widespread Earth Slides in the Unglaciated Southwestern Part of the State

Edwin W. Tooker, Barbara B. Poppe, Donald E. Trimble, Thomas S. Ahlbrandt, Debbi A. Naab, John S. Derr — 1949

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