@misc{indiciae343a59d91540,
  title = {Measured stratigraphic sections of Lower Cretaceous Blackleaf Formation and lower Upper Cretaceous Frontier Formation (lower part) in Beaverhead and Madison counties, Montana},
  author = {T. S. Dyman},
  year = {1985},
  doi = {10.3133/ofr85431},
  url = {https://pubs.usgs.gov/publication/ofr85431},
  note = {Source identifier: ofr85431}
}