@misc{indiciaed8bb0e016c81, title = {Stratigraphic cross section R - R' showing electric logs of upper Cretaceous and older rocks, Powder River Basin, Natrona, Converse, Niobrara, and Weston Counties, Wyoming}, author = {James E. Fox}, year = {1987}, doi = {10.3133/ofr86465r}, url = {https://pubs.usgs.gov/publication/ofr86465R}, note = {Source identifier: ofr86465R} }