@misc{indiciae703859c151bb,
  title = {Preliminary determination of epicenters; monthly listing January-March 1993},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1993},
  doi = {10.3133/ofr93600a},
  url = {https://pubs.usgs.gov/publication/ofr93600A},
  note = {Source identifier: ofr93600A}
}