@misc{indiciaee2ae202da41b,
  title = {Stratigraphic framework of Lower and Upper Cretaceous rocks in central and eastern Montana},
  author = {Steven M. Condon},
  year = {2000},
  doi = {10.3133/ds57},
  url = {https://pubs.usgs.gov/publication/ds57},
  note = {Source identifier: ds57}
}