@misc{indiciae173235ff37c4,
  title = {Aeromagnetic map of the Kensington quadrangle, Montgomery County, Maryland},
  author = {R. W. Bromery and F. P. Gilbert},
  year = {1963},
  doi = {10.3133/gp398},
  url = {https://pubs.usgs.gov/publication/gp398},
  note = {Source identifier: gp398}
}