@misc{indiciaed000424d6430,
  title = {Aeromagnetic map of the Lititz quadrangle, Lancaster and Lebanon Counties, Pennsylvania},
  author = {Randolph Wilson Bromery and G. L. Zandle},
  year = {1961},
  doi = {10.3133/gp257},
  url = {https://pubs.usgs.gov/publication/gp257},
  note = {Source identifier: gp257}
}