@misc{indiciaece45e3311c44,
  title = {Aeromagnetic map of Bel Air and vicinity, Harford, Baltimore, and Cecil Counties, Maryland},
  author = {R. W. Bromery and A. J. Petty and C. W. Smith},
  year = {1964},
  doi = {10.3133/gp482},
  url = {https://pubs.usgs.gov/publication/gp482},
  note = {Source identifier: gp482}
}