@misc{indiciae16cdd5363b41,
  title = {Earthquakes in the United States, April-June 1975},
  author = {W. J. Person and R. B. Simon and Carl W. Stover},
  year = {1977},
  doi = {10.3133/cir749b},
  url = {https://pubs.usgs.gov/publication/cir749B},
  note = {Source identifier: cir749B}
}