@misc{indiciae91b0c59bea4f,
  title = {Aeromagnetic map of the Lancaster quadrangle, Lancaster County, Pennsylvania},
  author = {Randolph Wilson Bromery and G. L. Zandle},
  year = {1961},
  doi = {10.3133/gp259},
  url = {https://pubs.usgs.gov/publication/gp259},
  note = {Source identifier: gp259}
}