@misc{indiciaebd0b09007d59,
  title = {A general earthquake-observation system (GEOS)},
  author = {R. D. Borcherdt and Joe B. Fletcher and E.G. Jensen and G.L. Maxwell and J.R. VanSchaack and R.E. Warrick and E. Cranswick and M.J.S. Johnston and R. McClearn},
  year = {1985},
  doi = {10.1785/bssa0750061783},
  url = {https://pubs.usgs.gov/publication/70012977},
  note = {Source identifier: 70012977}
}