@misc{indiciae5c469def1103,
  title = {Correlation chart of lower and upper Cretaceous Blackleaf Formation, Lima Peaks area to eastern Pioneer Mountains, southwestern Montana},
  author = {T. S. Dyman and R. G. Tysdal},
  year = {1990},
  doi = {10.3133/mf2119},
  url = {https://pubs.usgs.gov/publication/mf2119},
  note = {Source identifier: mf2119}
}