@misc{indiciaeee6bd189b644,
  title = {Aeromagnetic map of the Columbia quadrangle and part of the South Coventry quadrangle, Tolland, New London, and Windham Counties, Connecticut},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1973},
  doi = {10.3133/gp850},
  url = {https://pubs.usgs.gov/publication/gp850},
  note = {Source identifier: gp850}
}