@misc{indiciae9d5d0055017a,
  title = {Stratigraphy of Madison Group near Livingston, Montana, and discussion of karst and solution-breccia features},
  author = {A. E. Roberts},
  year = {1966},
  doi = {10.3133/pp526b},
  url = {https://pubs.usgs.gov/publication/pp526B},
  note = {Source identifier: pp526B}
}