@misc{indiciaec5e191380ec7,
  title = {Aeromagnetic profiles in central-western Virginia},
  author = {R. W. Johnson},
  year = {1957},
  doi = {10.3133/ofr5757},
  url = {https://pubs.usgs.gov/publication/ofr5757},
  note = {Source identifier: ofr5757}
}