@misc{indiciae355833ed9df8,
  title = {Preliminary determination of epicenters, monthly listing: April - June, 1987},
  author = {National Earthquake Information Center},
  year = {1988},
  doi = {10.3133/ofr87786b},
  url = {https://pubs.usgs.gov/publication/ofr87786B},
  note = {Source identifier: ofr87786B}
}