@misc{indiciaed9fcc6484fc8,
  title = {Aeromagnetic map of the Harrisburg-Scranton area, northeastern Pennsylvania},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1969},
  doi = {10.3133/gp669},
  url = {https://pubs.usgs.gov/publication/gp669},
  note = {Source identifier: gp669}
}