@misc{indiciae3fcb7ef40bf1,
  title = {Montana corundum mine, Gallatin County, Montana},
  author = {S.K. Neuschel and F.C. Armstrong},
  year = {1944},
  doi = {10.3133/ofr4438},
  url = {https://pubs.usgs.gov/publication/ofr4438},
  note = {Source identifier: ofr4438}
}