Topographic map. Whitehorse, SD 7.5 Quad. (1 : 24000). U.S. Geological Survey: Topographic., 1952 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Ian G. Speden Archives, 1956-1965Maps, 1951-19561952. Topagraphy maps of South Dakota from 1952.
Tracings. Tracings of South Dakota Topographic maps. Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Ian G. Speden Archives, 1956-1965Maps, 1951-1956