OC-76 Stratigraphic diagrams with electric logs of Upper Cretaceous rocks, Powder River basin, Sheridan, Johnson, Campbell, and Converse counties, Wyoming, section D-D', 1977, ISBN 978-0-607-82379-0 Keywords: Powder River Basin, Geologic maps, Bedrock, Stratigraphic Geology, Stratigraphy, Sheridan county, Johnson county, Campbell county, Converse county