@misc{indiciaeff1d1c6ead88,
  title = {Aeromagnetic map of the Contrary Creek quadrangle, Louisa and Spotsylvania Counties, Virginia},
  author = {R. W. Bromery and G.A. Galat and F. P. Gilbert},
  year = {1963},
  doi = {10.3133/gp389},
  url = {https://pubs.usgs.gov/publication/gp389},
  note = {Source identifier: gp389}
}