TY - RPRT TI - Stratigraphic cross section T - T' showing electric logs of upper Cretaceous and older rocks, Powder River Basin, Converse and Niobrara Counties, Wyoming AU - James E. Fox PY - 1987 DO - 10.3133/ofr86465t UR - https://pubs.usgs.gov/publication/ofr86465T ID - ofr86465T ER -