@misc{indiciae300e5be45705,
  title = {Aeromagnetic map of the Joplin quadrangle, Prince William and Stafford Counties, Virginia},
  author = {R. W. Bromery and G.A. Galat and E. J. Chandler},
  year = {1963},
  doi = {10.3133/gp390},
  url = {https://pubs.usgs.gov/publication/gp390},
  note = {Source identifier: gp390}
}