@misc{indiciae6239d81ca000,
  title = {Aeromagnetic map of the Gettysburg quadrangle and part of the Taneytown quadrangle, Adams County, Pennsylvania},
  author = {Randolph Wilson Bromery and N. C. Natoff},
  year = {1961},
  doi = {10.3133/gp284},
  url = {https://pubs.usgs.gov/publication/gp284},
  note = {Source identifier: gp284}
}