@misc{indiciae13e2cae02b23,
  title = {Estimation of response spectra and peak accelerations from western North American earthquakes; an interim report},
  author = {D.M. Boore and W. B. Joyner and T. E. Fumal},
  year = {1993},
  doi = {10.3133/ofr93509},
  url = {https://pubs.usgs.gov/publication/ofr93509},
  note = {Source identifier: ofr93509}
}