@misc{indiciae517b1eab912b,
  title = {Development of alert criteria for future volcanic unrest in Long Valley Caldera, California},
  author = {D.P. Hill},
  year = {1990},
  doi = {10.3133/ofr90658},
  url = {https://pubs.usgs.gov/publication/ofr90658},
  note = {Source identifier: ofr90658}
}