@misc{indiciaec79fda620d93,
  title = {Aeromagnetic map of the Womelsdorf quadrangle, Berks, Lebanon, and Lancaster Counties, Pennsylvania},
  author = {Randolph Wilson Bromery and G. L. Zandle},
  year = {1961},
  doi = {10.3133/gp239},
  url = {https://pubs.usgs.gov/publication/gp239},
  note = {Source identifier: gp239}
}