@misc{indiciaec6da6dd297d6,
  title = {Aeromagnetic map of part of the Hummelstown quadrangle, Dauphin County, Pennsylvania},
  author = {Randolph Wilson Bromery and G. L. Zandle},
  year = {1961},
  doi = {10.3133/gp267},
  url = {https://pubs.usgs.gov/publication/gp267},
  note = {Source identifier: gp267}
}