@misc{indiciaec7ab8a417d63,
  title = {Structure at the Upper Cretaceous Ardmore bentonite bed, Powder River basin, Wyoming and Montana},
  author = {James E. Fox and Debra K. Higley},
  year = {1987},
  doi = {10.3133/ofr87340w},
  url = {https://pubs.usgs.gov/publication/ofr87340W},
  note = {Source identifier: ofr87340W}
}