@misc{indiciaeafee812341f9,
  title = {Preliminary determination of epicenters monthly listing April - June 1997},
  author = {National Earthquake Information Center},
  year = {1998},
  doi = {10.3133/ofr97600b},
  url = {https://pubs.usgs.gov/publication/ofr97600B},
  note = {Source identifier: ofr97600B}
}