@misc{indiciaeb6803ac1b3de,
  title = {Aeromagnetic map of part of the Fairfield quadrangle and part of the Emmitsburg quadrangle, Adams County, Pennsylvania, and Frederick County, Maryland},
  author = {Randolph Wilson Bromery and B. L. White},
  year = {1961},
  doi = {10.3133/gp283},
  url = {https://pubs.usgs.gov/publication/gp283},
  note = {Source identifier: gp283}
}