@misc{indiciaecc960dcf03f5,
  title = {Ancient geomagnetic field intensities—III historic and archeological data: H13X and H14-15 geological data: G22-29},
  author = {P.J. Smith},
  year = {1968},
  doi = {10.1111/j.1365-246x.1968.tb02308.x},
  url = {https://pubs.usgs.gov/publication/70209027},
  note = {Source identifier: 70209027}
}