@misc{indiciae262e13f72469,
  title = {Magnetic anomalies over the continents},
  author = {Isidore Zietz},
  year = {2012},
  doi = {10.1029/eo052i005piu204},
  url = {https://pubs.usgs.gov/publication/70227410},
  note = {Source identifier: 70227410}
}