@misc{indiciae069c3d020021,
  title = {The Borrego Mountain earthquake of April 9, 1968},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1972},
  doi = {10.3133/pp787},
  url = {https://pubs.usgs.gov/publication/pp787},
  note = {Source identifier: pp787}
}