@misc{indiciae6d39638afcd5,
  title = {Test and calibration of the Seismic Research Observatory},
  author = {Jon Peterson and Charles R. Hutt and L. Gary Holcomb},
  year = {1980},
  doi = {10.3133/ofr80187},
  url = {https://pubs.usgs.gov/publication/ofr80187},
  note = {Source identifier: ofr80187}
}