@misc{indiciae984f39176336,
  title = {Preliminary determination of epicenters monthly listing July-September 1989},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1990},
  doi = {10.3133/ofr89600c},
  url = {https://pubs.usgs.gov/publication/ofr89600C},
  note = {Source identifier: ofr89600C}
}