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West face of South Cave Hills, Harding County, South Dakota. 1911. Plate 3-A in U.S. Geological Survey. Bulletin 627. 1916.
West face of South Cave Hills, Harding County, South Dakota. 1911. Plate 3-A in U.S. Geological Survey. Bulletin 627. 1916.
West face of South Cave Hills, Harding County, South Dakota. 1911. Plate 3-A in U.S. Geological Survey. Bulletin 627. 1916.
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