@misc{indiciae8b27977b5943,
  title = {Aeromagnetic map of the Middletown quadrangle, Dauphin, Lancaster, Lebanon, and York Counties, Pennsylvania},
  author = {Randolph Wilson Bromery and N. C. Natoff},
  year = {1961},
  doi = {10.3133/gp269},
  url = {https://pubs.usgs.gov/publication/gp269},
  note = {Source identifier: gp269}
}