@misc{indiciae5a66f600bd42,
  title = {Processed digital recordings for selected aftershocks of the October 15, 1979 Imperial Valley, California, earthquake},
  author = {K.W. Campbell and D.M. Hampson},
  year = {1989},
  doi = {10.3133/ofr89437},
  url = {https://pubs.usgs.gov/publication/ofr89437},
  note = {Source identifier: ofr89437}
}