@misc{indiciaed721e20a0d83,
  title = {IRIS/USGS plans for upgrading the Global Seismograph Network},
  author = {Jon Peterson and Charles R. Hutt},
  year = {1989},
  doi = {10.3133/ofr89471},
  url = {https://pubs.usgs.gov/publication/ofr89471},
  note = {Source identifier: ofr89471}
}