@misc{indiciae6f0e2e2c48dd,
  title = {Aeromagnetic map of Carroll County, Maryland},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1974},
  doi = {10.3133/ofr74205},
  url = {https://pubs.usgs.gov/publication/ofr74205},
  note = {Source identifier: ofr74205}
}