@misc{indiciae8fd7924caf00,
  title = {Montana aeromagnetic and gravity maps and data},
  author = {Anne McCafferty and Viki Bankey and K. C. Brenner},
  year = {1998},
  doi = {10.3133/ofr98333},
  url = {https://pubs.usgs.gov/publication/ofr98333},
  note = {Source identifier: ofr98333}
}