@misc{indiciaee0905eee7ea5,
  title = {Puerto Rico seismic program seismological data summary, July 1, 1975-December 31, 1977},
  author = {Rirchard L. Dart and David Carver and Mary Kay Wharton and Arthur C. Tarr},
  year = {1979},
  doi = {10.3133/ofr79870},
  url = {https://pubs.usgs.gov/publication/ofr79870},
  note = {Source identifier: ofr79870}
}