@misc{indiciaeaeb3a75f848b,
  title = {Aeromagnetic map of the Malvern quadrangle, Chester County, Pennsylvania},
  author = {Randolph Wilson Bromery and B. L. Bennett},
  year = {1959},
  doi = {10.3133/gp202},
  url = {https://pubs.usgs.gov/publication/gp202},
  note = {Source identifier: gp202}
}