@misc{indiciae25e840bb275a,
  title = {Preliminary catalog of earthquakes in northern Imperial Valley, California, January 1, 1977 to March 31, 1977},
  author = {Madeline Schnapp and Gary S. Fuis},
  year = {1978},
  doi = {10.3133/ofr7874},
  url = {https://pubs.usgs.gov/publication/ofr7874},
  note = {Source identifier: ofr7874}
}