@misc{indiciaee8814edee2c4,
  title = {Catalog of first motion focal mechanisms 1984-1985 : Volume 1},
  author = {R.E. Needham},
  year = {1988},
  doi = {10.3133/ofr86520a},
  url = {https://pubs.usgs.gov/publication/ofr86520A},
  note = {Source identifier: ofr86520A}
}