@misc{indiciaeff8c0dce7f90,
  title = {Preliminary determination of epicenters monthly listing, April-June 1990},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1990},
  doi = {10.3133/ofr90600b},
  url = {https://pubs.usgs.gov/publication/ofr90600B},
  note = {Source identifier: ofr90600B}
}