@misc{indiciae87bf04c2ee8c,
  title = {Principal facts and complete Bouguer gravity map, Blacktail Mountain drilling site, Flathead County, Montana},
  author = {Viki Bankey and Jody Paton and M. Dean Kleinkopf},
  year = {1981},
  doi = {10.3133/ofr81187},
  url = {https://pubs.usgs.gov/publication/ofr81187},
  note = {Source identifier: ofr81187}
}