@misc{indiciaef6180dabac01,
  title = {Earthquakes in the United States, January-March 1981},
  author = {J. H. Minsch and C. W. Stover and P. K. Dunbar and F. W. Baldwin},
  year = {1982},
  doi = {10.3133/cir871a},
  url = {https://pubs.usgs.gov/publication/cir871A},
  note = {Source identifier: cir871A}
}