@misc{indiciae4d2cf817ce11,
  title = {Four definitions of strong motion duration: Their predictability and utility for seismic hazard analysis},
  author = {Robin K. McGuire and T. P. Barnhard},
  year = {1979},
  doi = {10.3133/ofr791515},
  url = {https://pubs.usgs.gov/publication/ofr791515},
  note = {Source identifier: ofr791515}
}