@misc{indiciaecad19fbb5307,
  title = {Principal facts for a gravity survey of the Ennis, Montana, geothermal area},
  author = {R. Michael Senterfit},
  year = {1980},
  doi = {10.3133/ofr8098},
  url = {https://pubs.usgs.gov/publication/ofr8098},
  note = {Source identifier: ofr8098}
}