@misc{indiciaeb428dc1bbeac,
  title = {Preliminary log-derived maps of the Bakken Formation, North Dakota and Montana portions of Williston Basin},
  author = {T.C. Hester and J. W. Schmoker},
  year = {1983},
  doi = {10.3133/ofr83717},
  url = {https://pubs.usgs.gov/publication/ofr83717},
  note = {Source identifier: ofr83717}
}