STRATIGRAPHY AND COMPOSITION OF THE SHARON SPRINGS MEMBER OF THE PIERRE SHALE IN WESTERN KANSAS: PROFESSIONAL PAPER 728
Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1972. Soft cover. Stratigraphic and mineralogic study of one of the more distinctive and widespread shale units of Late Cretaceous age in the western interior of the United States. 50 pages with maps, sections, photographs, tables, bibliography and index, plus the two..... More