@misc{indiciaefb430c17da65,
  title = {Structure at the Upper Cretaceous Clay Spur bentonite bed, Powder River basin, Wyoming and Montana},
  author = {J. E. Fox and Debra K. Higley},
  year = {1987},
  doi = {10.3133/ofr87340x},
  url = {https://pubs.usgs.gov/publication/ofr87340X},
  note = {Source identifier: ofr87340X}
}