@misc{indiciae7f4edaba8cde,
  title = {Finding the gaps in America’s magnetic maps},
  author = {Benjamin J. Drenth and V. J. Grauch},
  year = {2019},
  doi = {10.1029/2019eo120449},
  url = {https://pubs.usgs.gov/publication/70215748},
  note = {Source identifier: 70215748}
}