@misc{indiciae4f14bf14a9aa,
  title = {Aeromagnetic map of the Red Lion quadrangle, York County, Pennsylvania},
  author = {Randolph Wilson Bromery and G. L. Zandle},
  year = {1961},
  doi = {10.3133/gp271},
  url = {https://pubs.usgs.gov/publication/gp271},
  note = {Source identifier: gp271}
}