@misc{indiciaec61b7c574494,
  title = {Aeromagnetic map of the Lahore quadrangle, Louisa, Spotsylvania, and Orange Counties, Virginia},
  author = {R. W. Bromery and G.A. Galat and F. P. Gilbert},
  year = {1963},
  doi = {10.3133/gp386},
  url = {https://pubs.usgs.gov/publication/gp386},
  note = {Source identifier: gp386}
}