@misc{indiciae495c0fbe864a,
  title = {Aeromagnetic map of the Ellsworth quadrangle, Litchfield County, Connecticut},
  author = {P. W. Philbin and C. W. Smith},
  year = {1966},
  doi = {10.3133/gp583},
  url = {https://pubs.usgs.gov/publication/gp583},
  note = {Source identifier: gp583}
}