@misc{indiciaeafdd475f51e5,
  title = {Correlation chart of lower Cretaceous rocks, Madison Range to Lima Peaks area, southwestern Montana},
  author = {R. G. Tysdal and T. S. Dyman and D. J. Nichols},
  year = {1989},
  doi = {10.3133/mf2067},
  url = {https://pubs.usgs.gov/publication/mf2067},
  note = {Source identifier: mf2067}
}