@misc{indiciae304bbe07016e,
  title = {Aeromagnetic map of the Richland quadrangle, Lebanon and Lancaster Counties, Pennsylvania},
  author = {Randolph Wilson Bromery and G. L. Zandle},
  year = {1961},
  doi = {10.3133/gp255},
  url = {https://pubs.usgs.gov/publication/gp255},
  note = {Source identifier: gp255}
}