TY - RPRT TI - Selected stratigraphic sections and electric logs of Upper Cretaceous rocks in the Powder River Basin, Wyoming AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1974 DO - 10.3133/ofr741114 UR - https://pubs.usgs.gov/publication/ofr741114 ID - ofr741114 ER -