@misc{indiciae900e2c45fe6a,
  title = {Wisconsin aeromagnetic and gravity maps and data: A web site for distribution of data},
  author = {David L. Daniels and Stephen L. Snyder},
  year = {2002},
  doi = {10.3133/ofr02493},
  url = {https://pubs.usgs.gov/publication/ofr02493},
  note = {Source identifier: ofr02493}
}