@misc{indiciaef424f7e49ad8,
  title = {Aeromagnetic map of the Belmont quadrangle, Orange and Spotsylvania Counties, Virginia},
  author = {R.W. Bromery and G.A. Galat and F. P. Gilbert},
  year = {1963},
  doi = {10.3133/gp387},
  url = {https://pubs.usgs.gov/publication/gp387},
  note = {Source identifier: gp387}
}