@misc{indiciae49f49dcf120d,
  title = {National Seismic System science plan},
  author = {Thomas H. Heaton and D.L. Anderson and W.J. Arabasz and Ray Buland and W.L. Ellsworth and S.H. Hartzell and Thome Lay and Paul Spudich},
  year = {1989},
  doi = {10.3133/cir1031},
  url = {https://pubs.usgs.gov/publication/cir1031},
  note = {Source identifier: cir1031}
}