@misc{indiciae07bde0739172,
  title = {Preliminary catalog of earthquakes in northern Imperial Valley, California, October 1, 1976 - December 31, 1976},
  author = {Madeline Schnapp and Gary S. Fuis},
  year = {1977},
  doi = {10.3133/ofr77431},
  url = {https://pubs.usgs.gov/publication/ofr77431},
  note = {Source identifier: ofr77431}
}