@misc{indiciae38c04c786556,
  title = {Earthquake Data Report, April 1990},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1990},
  doi = {10.3133/ofr90604b},
  url = {https://pubs.usgs.gov/publication/ofr90604B},
  note = {Source identifier: ofr90604B}
}