@misc{indiciaefb726698ab0d,
  title = {Digital seismograms of aftershocks of the Imperial Valley, California, earthquake of October 15, 1979},
  author = {Joe B. Fletcher and Ricardo L. Zepeda and David M. Boore},
  year = {1981},
  doi = {10.3133/ofr81655},
  url = {https://pubs.usgs.gov/publication/ofr81655},
  note = {Source identifier: ofr81655}
}