@misc{indiciae771f8d7e705c,
  title = {Aeromagnetic map of the Manheim quadrangle, Lancaster and Lebanon Counties, Pennsylvania},
  author = {Randolph Wilson Bromery and G. L. Zandle},
  year = {1961},
  doi = {10.3133/gp256},
  url = {https://pubs.usgs.gov/publication/gp256},
  note = {Source identifier: gp256}
}