@misc{indiciae3e2f3bd47a11,
  title = {The Imperial Valley, California, earthquake, October 15, 1979; time dependent response spectrum plots},
  author = {Virgilio Perez},
  year = {1982},
  doi = {10.3133/ofr82183},
  url = {https://pubs.usgs.gov/publication/ofr82183},
  note = {Source identifier: ofr82183}
}