TY - RPRT TI - Stratigraphic cross sections A-A' through F-F', showing electric logs of upper Cretaceous and older rocks, Powder River Basin, Montana and Wyoming AU - J. E. Fox PY - 1993 DO - 10.3133/oc135 UR - https://pubs.usgs.gov/publication/oc135 ID - oc135 ER -