@misc{indiciae4cf0d9016b6e,
  title = {Methods of installing United States National Seismographic Network (USNSN) stations -- a construction manual},
  author = {John R. McMillan},
  year = {2002},
  doi = {10.3133/ofr02144},
  url = {https://pubs.usgs.gov/publication/ofr02144},
  note = {Source identifier: ofr02144}
}