@misc{indiciae6e65b24e1437,
  title = {Stratigraphic sections and correlation of beds in the Inyan Kara Group and Morrison Formation, north end of the Black Hills, Crook County, Wyoming, and Butte County, South Dakota},
  author = {W. J. Mapel and C. L. Pillmore},
  year = {1963},
  doi = {10.3133/ofr6388},
  url = {https://pubs.usgs.gov/publication/ofr6388},
  note = {Source identifier: ofr6388}
}