@misc{indiciaeb0d92b84fa72,
  title = {Map showing global distribution of first-motion focal mechanisms, 1981-1985},
  author = {S.K. Goter},
  year = {1988},
  doi = {10.3133/gp990},
  url = {https://pubs.usgs.gov/publication/gp990},
  note = {Source identifier: gp990}
}