@misc{indiciaebd889727cf30,
  title = {Catalog of first motion focal mechanisms 1981-1983; Volume 3},
  author = {R.E. Needham},
  year = {1986},
  doi = {10.3133/ofr86285c},
  url = {https://pubs.usgs.gov/publication/ofr86285C},
  note = {Source identifier: ofr86285C}
}