@misc{indiciaeb4dfef9e7437,
  title = {Aeromagnetic map of part of the Bedminster quadrangle, Bucks County, Pennsylvania},
  author = {Randolph Wilson Bromery and G. L. Zandle and and others},
  year = {1960},
  doi = {10.3133/gp260},
  url = {https://pubs.usgs.gov/publication/gp260},
  note = {Source identifier: gp260}
}