@misc{indiciae66a82c815b67,
  title = {Stratigraphy and sedimentary facies of the Madison limestone and associated rocks in parts of Montana, North Dakota, South Dakota, Wyoming, and Nebraska},
  author = {James A. Peterson},
  year = {1981},
  doi = {10.3133/ofr81642},
  url = {https://pubs.usgs.gov/publication/ofr81642},
  note = {Source identifier: ofr81642}
}