@misc{indiciae37bfd615ebc5,
  title = {Taking the Earth's pulse},
  author = {Robert L. Woodward and Harly M. Benz and William M. Brown},
  year = {1997},
  doi = {10.3133/fs10397\_1997},
  url = {https://pubs.usgs.gov/publication/fs10397\_1997},
  note = {Source identifier: fs10397\_1997}
}