@misc{indiciae653da1fdd1d3,
  title = {Catalog of first motion focal mechanisms 1981-1983; Volume 1},
  author = {R.E. Needham},
  year = {1986},
  doi = {10.3133/ofr86285a},
  url = {https://pubs.usgs.gov/publication/ofr86285A},
  note = {Source identifier: ofr86285A}
}