@misc{indiciae2007a59fccbe,
  title = {An evaluation of the accuracy of geomagnetic data obtained from an unattended, automated, quasi-absolute station},
  author = {D.C. Herzog},
  year = {1990},
  doi = {10.1016/0031-9201(90)90216-k},
  url = {https://pubs.usgs.gov/publication/70016079},
  note = {Source identifier: 70016079}
}