@misc{indiciaea5a43fbb7322,
  title = {Map showing cumulative thickness of sandstone in the Swift Formation, Montana},
  author = {Richard D. Feltis},
  year = {1982},
  doi = {10.3133/wri824030},
  url = {https://pubs.usgs.gov/publication/wri824030},
  note = {Source identifier: wri824030}
}