@misc{indiciae7b8d4221a539, title = {Stratigraphic cross section U - U' showing electric logs of Upper Cretaceous and older rocks, Powder River Basin, Powder River County, Montana and Campbell, Converse, and Niobrara Counties, Wyoming}, author = {James E. Fox}, year = {1988}, doi = {10.3133/ofr86465u}, url = {https://pubs.usgs.gov/publication/ofr86465U}, note = {Source identifier: ofr86465U} }