TY - RPRT TI - Stratigraphic cross section S - S' showing electric logs of Upper Cretaceous and older rocks, Powder River Basin, Converse, Niobrara, and Weston Counties, Wyoming AU - James E. Fox PY - 1987 DO - 10.3133/ofr86465s UR - https://pubs.usgs.gov/publication/ofr86465S ID - ofr86465S ER -