@misc{indiciae03758e0fbb66,
  title = {Aeromagnetic map of the Buckingham quadrangle, Bucks County, Pennsylvania},
  author = {Randolph Wilson Bromery and John R. Henderson and G. L. Zandle},
  year = {1959},
  doi = {10.3133/gp215},
  url = {https://pubs.usgs.gov/publication/gp215},
  note = {Source identifier: gp215}
}