@misc{indiciae8fec4131ca23,
  title = {Stratigraphy and depositional environment of nonmarine facies of Frontier Formation, Eastern Pioneer Mountains, southwestern Montana},
  author = {T. S. Dyman and R. G. Tysdal},
  year = {1998},
  url = {https://pubs.usgs.gov/publication/70020923},
  note = {Source identifier: 70020923}
}