@misc{indiciae0de8f35e87c5,
  title = {Aeromagnetic map of Howard County, Maryland},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1974},
  doi = {10.3133/ofr74207},
  url = {https://pubs.usgs.gov/publication/ofr74207},
  note = {Source identifier: ofr74207}
}