@misc{indiciae74845790523f,
  title = {Aeromagnetic map of part of the Essex quadrangle, Middlesex and New London Counties, Connecticut},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1973},
  doi = {10.3133/gp877},
  url = {https://pubs.usgs.gov/publication/gp877},
  note = {Source identifier: gp877}
}