@misc{indiciae629ac7d05cd7,
  title = {Pre-gilbertian conceptions of terrestrial magnetism},
  author = {P.J. Smith},
  year = {1968},
  doi = {10.1016/0040-1951(68)90075-9},
  url = {https://pubs.usgs.gov/publication/70009843},
  note = {Source identifier: 70009843}
}