@misc{indiciae465d9b158b31,
  title = {Aeromagnetic map of part of Cecil County, Maryland, and parts of adjacent counties in Maryland and Delaware},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1971},
  doi = {10.3133/gp755},
  url = {https://pubs.usgs.gov/publication/gp755},
  note = {Source identifier: gp755}
}