@misc{indiciae6ec5641d2aee,
  title = {Virginia aeromagnetic and gravity maps and data: A web site for distribution of data},
  author = {Stephen L. Snyder},
  year = {2005},
  doi = {10.3133/ofr20051052},
  url = {https://pubs.usgs.gov/publication/ofr20051052},
  note = {Source identifier: ofr20051052}
}