@misc{indiciae5f50e9603435,
  title = {Bulletin of the Seismological Laboratory for the period from 1 January 1975 to 31 December 1979},
  author = {G.M. Smith and F.D. Ryall},
  year = {1980},
  doi = {10.3133/ofr81231},
  url = {https://pubs.usgs.gov/publication/ofr81231},
  note = {Source identifier: ofr81231}
}