@misc{indiciae3e982c7f137a,
  title = {Ancient geomagnetic field intensities—II geological data: Sets G1–G21 historic and archeological data: H10–H13},
  author = {Peter J. Smith},
  year = {1967},
  doi = {10.1111/j.1365-246x.1967.tb02300.x},
  url = {https://pubs.usgs.gov/publication/70210848},
  note = {Source identifier: 70210848}
}