@misc{indiciaec70a1a9533dd,
  title = {Aeromagnetic map of part of the Guilford quadrangle, New Haven County, Connecticut},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1973},
  doi = {10.3133/gp875},
  url = {https://pubs.usgs.gov/publication/gp875},
  note = {Source identifier: gp875}
}