@misc{indiciae9dfe151e5460,
  title = {The Livingston Formation in the Madison Range of southwestern Montana},
  author = {Russell G. Tysdal and D. J. Nichols and Gary R. Winkler},
  year = {1987},
  doi = {10.3133/b1665},
  url = {https://pubs.usgs.gov/publication/b1665},
  note = {Source identifier: b1665}
}