@misc{indiciae7604748b8f26,
  title = {Aeromagnetic map of the Mineral quadrangle, Louisa, Spotsylvania, and Orange Counties, Virginia},
  author = {R.W. Bromery and G.A. Galat and F. P. Gilbert},
  year = {1963},
  doi = {10.3133/gp388},
  url = {https://pubs.usgs.gov/publication/gp388},
  note = {Source identifier: gp388}
}