@misc{indiciaea1c7b93bc378,
  title = {Physical properties of rock samples from the Butte 1 degree by 2 degrees Quadrangle, Montana},
  author = {J. H. Hassemer and D. J. Lidke},
  year = {1986},
  doi = {10.3133/ofr86435},
  url = {https://pubs.usgs.gov/publication/ofr86435},
  note = {Source identifier: ofr86435}
}